Physics Physics Practice Problems Solutions Library

# Intro to Forces + Newton's Laws Solutions Library

Access 56 Intro to Forces + Newton's Laws video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Intro to Forces + Newton's Laws learn videos.

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56 solutions

Intro to Forces + Newton's Laws

#### Q. The 10 kg block in the figure is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a te...

Solved • Jul 20, 2020

Intro to Forces + Newton's Laws

#### Q. YOU hold a picture motionless against a wall by pressing on it.Identify all forces acting on the object and draw the free-body diagram.Draw the vec...

Solved • Jul 17, 2020

Intro to Forces + Newton's Laws

#### Q. Now we draw the line of action for each force. This is the line along which the force acts, and it extends in both directions. The line of action f...

Solved • Jul 17, 2020

Intro to Forces + Newton's Laws

#### Q. Identify the long-range forces acting on the crate. Check all that apply. weight-- spring force--tension-- normal force-- static friction-- kinetic...

Solved • Jul 17, 2020

Intro to Forces + Newton's Laws

#### Q.  Consider a book on top of a level table while the book is being pressed straight down by a hand.i. In the space below, draw a free-body diagram fo...

Solved • Jul 13, 2020

Intro to Forces + Newton's Laws

#### Q. 1. A string is tied to a book and pulled lightly as shown in the diagram. The book remains in contact with the table and does not move. a. Draw a f...

Solved • Jul 13, 2020

Intro to Forces + Newton's Laws

#### Q. To understand the meaning and the basic applications of Newton's 1st and 2nd laws. In this problem, you are given a diagram (Figure 1) representing...

Solved • Jul 13, 2020

Intro to Forces + Newton's Laws

#### Q. A 10-kg sign is held by two ropes as shown in the figure below. What is the tension on rope A? a. 44 N b. 88 N c. 69 N d. 98 N e. 72 N

Solved • Jun 2, 2020

Intro to Forces + Newton's Laws

#### Q. Consider the truss shown in the diagram. The applied forces are P =570 lb and P2 = 430 lb and the distance is d=8.50 ft. A. For this truss, what jo...

Solved • Jun 2, 2020

Intro to Forces + Newton's Laws

#### Q. A chain is suspended by a rope as shown at right. The chain is composed of four identical links and does not move. Rank, from largest to smallest, ...

Solved • Jun 2, 2020

Intro to Forces + Newton's Laws

#### Q. Weight is actually just a one-word nickname for the force of gravity acting on an object. Many physics educators don't like the term since it can c...

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. A rocket is being launched straight up. Air resistance is not negligible. Draw a free body diagram.

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. A student solving for the acceleration of an object has applied appropriate physics principles and obtained the expression  a = a1 + F/m  where  a1...

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. Figure 1 shows an acceleration-versus-force graph for three objects pulled by rubber bands. The mass of object 2 is 0.40kg.Part A) What is the mass...

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. Two forces, of magnitude 4 N and 10 N, are applied to an object. The relative direction of the forces is unknown. The net force acting on the objec...

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. 1. A block of mass 2 kg is acted upon by two forces: 3 N (directed to the left) and 4 N (directed to the right). What can you say about the block's...

Solved • May 21, 2020

Intro to Forces + Newton's Laws

#### Q. A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake as shown in the figure. Gine the coefficient of static f...

Solved • May 19, 2020

Intro to Forces + Newton's Laws

#### Q. 1. An object cannot remain at rest unless which of the following holds?a. The net force acting on it is zero.b. The net force acting on it is const...

Solved • May 19, 2020

Intro to Forces + Newton's Laws

#### Q. Newton's second law states: sum of forces = mass × acceleration. If a known force was applied to an object with a known mass, how would you predict...

Solved • May 7, 2020

Intro to Forces + Newton's Laws

#### Q. The figure shows an acceleration-versus-force graph for three objects pulled by rubber bands. The mass of object 2 is 0.30 kg.What is the mass of o...

Solved • May 2, 2020

Intro to Forces + Newton's Laws

#### Q. A 23 kg child goes down a straight slide inclined 38 degrees above horizontal. The child is acted on by his weight, the normal force from the slide...

Solved • Apr 28, 2020

Intro to Forces + Newton's Laws

#### Q. Your car is accelerating to the right from a stop.a. Identify all forces acting on the object and draw the free-body diagram.b, Draw the vectors st...

Solved • Apr 28, 2020

Intro to Forces + Newton's Laws

#### Q. Which of the following quantities would be acceptable representations of weight? Check all that apply. a) 12.0 lb b) 0.34 g c) 120 kg d) 1600 kN e)...

Solved • Apr 28, 2020

Intro to Forces + Newton's Laws

#### Q. Consider the baby being weighed in the figure.1. What is the mass (in kg) of the child and basket if a scale reading of 56N is observed?2. What is ...

Solved • Apr 28, 2020

Intro to Forces + Newton's Laws

#### Q. a) In the definition of weight, W = mg, the mass m refers to a gravitational mass. True or Falseb) For a cart moving along a track with the x-axis ...

Solved • Apr 28, 2020

Intro to Forces + Newton's Laws

#### Q. You swing a bat and hit a heavy box with a force of 1500 N. The force the box exerts on the bat isA. less than 1500 N if the box moves.B. greater t...

Solved • Apr 24, 2020

Intro to Forces + Newton's Laws

#### Q. A heavy box is in the back of a truck. the truck is accelerating to the right. Apply your analysis to the box.a) draw a motion diagramb) draw a for...

Solved • Apr 23, 2020

Intro to Forces + Newton's Laws

#### Q. Due to the drivers not paying attention, a small car and a big truck collide; both are initially moving at 35 mph towards each other. Compare the m...

Solved • Apr 22, 2020

Intro to Forces + Newton's Laws

#### Q. A gymnast has just landed on a trampoline. She's still moving downward as the trampoline stretches. Draw a free-body diagram for the gymnast. Draw ...

Solved • Apr 22, 2020

Intro to Forces + Newton's Laws

#### Q. a. Suppose you have a tug of war with a friend who is the same size and weight as you are. You both pull as hard as you can, but neither of you see...

Solved • Apr 21, 2020

Intro to Forces + Newton's Laws

#### Q. A baseball player is sliding into second base. Identify the forces on the baseball player. Check all that apply.a) Thrustb) Kinetic frictionc) Stat...

Solved • Apr 10, 2020

Intro to Forces + Newton's Laws

#### Q. In the definition of weight, W = mg, the mass m refers to an inertial mass.True or falseFor a cart moving along a track with the x-axis parallel to...

Solved • Apr 8, 2020

Intro to Forces + Newton's Laws

#### Q. A hand pushes three identical bricks as shown. The bricks are moving to the left and speeding up. System A consists of two bricks stacked together....

Solved • Apr 8, 2020

Intro to Forces + Newton's Laws

#### Q. In Newton's second law, F = ma, the mass m is a gravitational mass.a) Trueb) False

Solved • Apr 8, 2020

Intro to Forces + Newton's Laws

#### Q. Your car is skidding to a stop from a high speed. Part A Identify all forces acting on the object.Check all that apply.Weight,  wTension, TKinetic ...

Solved • Apr 7, 2020

Intro to Forces + Newton's Laws

#### Q. A) An object cannot remain at rest unless which of the following holds?a) The net force acting on it is zero.b) The net force acting on it is const...

Solved • Apr 7, 2020

Intro to Forces + Newton's Laws

#### Q. A car and a dump truck are involved in an accident and crash into each other. Assuming the only force acting is the force of collision, which one e...

Solved • Mar 25, 2020

Intro to Forces + Newton's Laws

#### Q. An object cannot remain at rest unlessa) there are no forces at all acting on it.b) the net force acting on it is zero.c) the net force acting on i...

Solved • Mar 17, 2020

Intro to Forces + Newton's Laws

#### Q. A book weighing 5 N rests on top of a table.1. A downward force of magnitude 5 N is exerted on the book by the force ofA. the tableB. gravityC. ine...

Solved • Mar 11, 2020

Intro to Forces + Newton's Laws

#### Q. If a car is moving to the left with constant velocity, one can conclude thata) there must be no forces applied to the car.b) the net force applied ...

Solved • Mar 11, 2020

Intro to Forces + Newton's Laws

#### Q. A book is at rest on an incline as shown above. A constant force vertically downward is in contact with the book. The following figures show severa...

Solved • May 24, 2017

Intro to Forces + Newton's Laws

#### Q. Despite a very strong wind, a tennis player manages to hit a tennis ball with her racquet so that the ball passes over the net and lands in her opp...

Solved • May 17, 2017

Intro to Forces + Newton's Laws

#### Q. An object is moving to the right, and experiencing a net force that is directed to the right. The magnitude of the force is decreasing with time. T...

Solved • Mar 6, 2017

Intro to Forces + Newton's Laws

#### Q. If you were to move into outer space far from any stars on planets, A) both your weight and mass would change. B) your mass would change, but you...

Solved • Jan 18, 2017

Intro to Forces + Newton's Laws

#### Q. Which of the following statements about forces is  not correct?A) In order for an object to turn, a force must be applied on itB) In order for an o...

Solved • Jan 18, 2017

Intro to Forces + Newton's Laws

#### Q. Suppose someone is standing on a scale.  (a) Draw a free body diagram of the forces acting on the person (b) List what the scale would read if th...

Solved • Jan 16, 2017

Intro to Forces + Newton's Laws

#### Q. Under the influence of a constant force F, an object with mass m has acceleration a. Halving the force but doubling the mass will change the accele...

Solved • Jan 16, 2017

Intro to Forces + Newton's Laws

#### Q. A rock attached to a string is whirled in a horizontal circle. If the string breaks suddenly, the rock will A) initially move radially outward fro...

Solved • Jan 16, 2017

Intro to Forces + Newton's Laws

#### Q. In outer space, where there is no gravity or air, an astronaut pushes with an equal force of 15 N on a 3-kg moon rock and on a 6-kg moon rock.A) Si...

Solved • Jan 16, 2017

Intro to Forces + Newton's Laws

#### Q. A 140-lb restaurant manager received a shipment of frozen meat in a 1600 N crate. She pushes it across the floor applying a 90 N force with her han...

Solved • Jan 16, 2017

Intro to Forces + Newton's Laws

#### Q. A child weighs 335 N. What is the child's mass?A) 3286.4 kgB) 75.3 kgC) 335.0 kgD) 1488.9 kgE) 34.1 kg

Solved • Jan 13, 2017

Intro to Forces + Newton's Laws

#### Q. In outer space, where there is no gravity or air, an astronaut pushes with a force of 25 N on a 2 kg moon rock with one hand and force of 25 N on a...

Solved • Jan 13, 2017

Intro to Forces + Newton's Laws

#### Q. A 165 lb researcher received a shipment of lab equipment in a 1600 N crate. She pushes it across the floor applying a 115 N force with her hands. W...

Solved • Jan 13, 2017

Intro to Forces + Newton's Laws

#### Q. Newton's Third Law of Motion says: Forces always come in pairs: when one object exerts a force on a second object, the second exerts an equal and o...

Solved • Jan 13, 2017

Intro to Forces + Newton's Laws

#### Q. A body moves in a straight line with a constant speed. Which of the following must be true?A) There is no net force acting on the body.B) There is ...

Solved • Jan 13, 2017

Intro to Forces + Newton's Laws

#### Q. A box, mass 3.5 kg, sits on a horizontal frictionless table. A 11 N force is applied to the box at an angle 27° below the horizontal. What is the r...

Solved • Dec 22, 2016