Physics Physics Practice Problems Solutions Library

# Intro to Conservation of Energy Solutions Library

Access 35 Intro to Conservation of Energy video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Intro to Conservation of Energy learn videos.

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35 solutions

Intro to Conservation of Energy

#### Q. A roller coaster car may be approximated by a block of mass m. The car, which starts from rest, is released at a height above the ground and slides...

Solved • Jul 15, 2020

Intro to Conservation of Energy

#### Q. A proton has an initial speed of 3.9 x 105 m/s.What potential difference is required to reduce the initial kinetic energy of the proton by a factor...

Solved • Jul 14, 2020

Intro to Conservation of Energy

#### Q. A proton has an initial speed of 3.9 x 105 m/s.What potential difference is required to bring the proton to rest?

Solved • Jul 13, 2020

Intro to Conservation of Energy

#### Q.  A block of mass m slides at a speed v along a horizontal, smooth table. It next slides down a smooth ramp, descending a height h, and then slides ...

Solved • May 11, 2020

Intro to Conservation of Energy

#### Q. In this video, we use the law of conservation of energy. For the systems we consider what?a.The initial potential energy of the system equals the f...

Solved • May 5, 2020

Intro to Conservation of Energy

#### Q. Using conservation of energy, find the speed vb of the block at the bottom of the ramp. Express your answer in terms of some or all the variables m...

Solved • Apr 28, 2020

Intro to Conservation of Energy

#### Q. An object is thrown directly upward with some initial speed v.Using conservation of energy, find the maximum height hmax to which the object will r...

Solved • Apr 8, 2020

Intro to Conservation of Energy

#### Q. Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 2.0 km/s.A) The first meteoroid is heading straight for earth...

Solved • Mar 11, 2020

Intro to Conservation of Energy

#### Q. An astronaut on earth can throw a ball straight up to a height of 16 m .How high can he throw the ball on Mars?

Solved • Feb 18, 2019

Intro to Conservation of Energy

#### Q. Jane, looking for Tarzan, is running at top speed (4.8 m/s ) and grabs a vine hanging vertically from a tall tree in the jungle.How high can she sw...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. A 6.0 kg monkey swings from one branch to another 1.5 m higher. What is the change in gravitational potential energy?

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. In one day, a 85 kg mountain climber ascends from the 1520 m level on a vertical cliff to the top at 2420 m. The next day, she descends from the to...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. The maximum height a typical human can jump from a crouched start is about 60.0 cm .By how much does the gravitational potential energy increase fo...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. A man with mass exttip{m}{m} sits on a platform suspended from a movable pulley, as shown in the figure , and raises himself at constant speed by ...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. A 72.0-kg swimmer jumps into the old swimming hole from a diving board 3.25 m above the water.Use energy conservation to find his speed just as he ...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. Consider the process shown in the figure below. Suppose E1 = 3 J. What is the final kinetic energy of the system for the process shown in the figure?

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. Object A is stationary while objects B and C are in motion. Forces from object A do 16 J of work on object B and -5 J of work on object ...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. A system loses 660 J of potential energy. In the process, it does 660 J of work on the environment and the thermal energy increases by 160 J. Find ...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. (a) How much work is done by the environment in the process shown in the figure?(b) Is energy transferred from the environment to the system or fro...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. The lowest point in Death Valley is 85 m below sea level. The summit of nearby Mt. Whitney has an elevation of 4420 m above sea level.What is the c...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. What is the kinetic energy of a 1700 kg car traveling at a speed of 30 m/s ( 65)?From what height would the car have to be dropped to have this sa...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. With what minimum speed must you toss a 160 g ball straight up to just touch the 13-m-high roof of the gymnasium if you release the ball 1.4 ...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. A 1500 kg car traveling at 16 m/s suddenly runs out of gas while approaching the valley shown in the figure. The alert driver immediately puts the...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. is the energy bar chart for a firefighter sliding down a fire pole from the second floor to the ground. Let the system consist of the firef...

Solved • Oct 31, 2018

Intro to Conservation of Energy

#### Q. Consider the two spheres shown here, one made of silver and the other of aluminum. The spheres are dropped from a height of 2.1 m.What is the veloc...

Solved • Oct 25, 2018

Intro to Conservation of Energy

#### Q. A 0.20-kg stone is held 1.3 m above the top edge of a water well and then dropped into it. The well has a depth of 5.0 m. Relative to the configura...

Solved • Oct 19, 2018

Intro to Conservation of Energy

#### Q. At time t i, the kinetic energy of a particle is 30.0 J and the potential energy of the system to which it belongs is 10.0 J. At some later time tf...

Solved • Oct 18, 2018

Intro to Conservation of Energy

#### Q. A ball of mass m falls from a height h to the floor.(a) Write the appropriate version of Equation 8.2 for the system of the ball and the Earth and ...

Solved • Oct 15, 2018

Intro to Conservation of Energy

#### Q. The potential energy between two identical atoms has the form U(x) = A / x 10 − B / x5 where x is the separation distance between the atoms and A a...

Solved • May 17, 2017

Intro to Conservation of Energy

#### Q. You and your friend, who weighs the same as you, want to go to the top of the Eiffel Tower. Your friend takes the elevator straight up. You decide ...

Solved • Apr 6, 2017

Intro to Conservation of Energy

#### Q. Swimmers at water park have a choice of two frictionless water slides, as shown in the figure. Although both slides drop over the same height h, sl...

Solved • Apr 6, 2017

Intro to Conservation of Energy

#### Q. Is it possible for a system to have negative potential energy? A. Yes, as long as the total energy is positive. B. Yes, since the choice of the z...

Solved • Mar 3, 2017

Intro to Conservation of Energy

#### Q. A 150 g object starts on the ground, is moved 1.2 m in the +x direction over a frictionless surface, is then moved upwards 50 cm, then moved in a s...

Solved • Feb 20, 2017

Intro to Conservation of Energy

#### Q. A 12 kg mass is moving down a frictionless incline under the influence of gravity. If the incline has a height of 1 m, and an incline angle of 35°,...

Solved • Feb 10, 2017

Intro to Conservation of Energy

#### Q. When an object moves from A to point B, gravity does positive work on the object. When the object from point A to point B, its gravitational potent...

Solved • Jan 27, 2017