Physics Physics Practice Problems Solutions Library

Motion Of Multiple Objects Solutions Library

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42 solutions

Motion Of Multiple Objects

Q. At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.2 m/s2. At the same instant a truck, traveli...

Solved • Sep 25, 2019

Motion Of Multiple Objects

Q. Two planes approach each other head-on. Each has a speed of 760 km/h , and they spot each other when they are initially 13.0 km apart.How much tim...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A police car at rest, passed by a speeder traveling at a constant 130 km/h , takes off in hot pursuit. The police officer catches up to the speeder...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A stone is dropped from the roof of a high building. A second stone is dropped 1.50 s later. How far apart are the stones when the second one has r...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A rock is thrown vertically upward with a speed of 16.0 m/s. Exactly 1.00 s later, a ball is thrown up vertically along the same path with a speed ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A fugitive tries to hop on a freight train traveling at a constant speed of 5.1 m/s . Just as an empty box car passes him, the fugitive starts from...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. An unmarked police car traveling a constant 95 km/h is passed by a speeder. Precisely 2.00 s after the speeder passes, the police officer steps o...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Mary and Sally are in a foot race (see figure). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who h...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. An automobile traveling 95 km/h overtakes a 1.10-km-long train traveling in the same direction on a track parallel to the road.If the trains speed...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A car traveling 95 km/h is 110 m behind a truck traveling 75 km/h. How long will it take the car to reach the truck?

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/s2...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A car and a truck start from rest at the same instant, with the car initially at some distance behind the truck. The truck has a constant accelerat...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Determined to test the law of gravity for himself, a student walks off a skyscraper 180 m high, stopwatch in hand, and starts his free fall (zero i...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.30 ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A juggler performs in a room whose ceiling is a height 3.1 m above the level of his hands. He throws a ball upward so that it just reaches the ceil...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. You are standing at rest at a bus stop. A bus moving at a constant speed of 5.00 m/s passes you. When the rear of the bus is 16.0 m past you, you...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A student is running at her top speed of 5.1 m/s to catch a bus, which is stopped at the bus stop. When the student is still a distance 40.1 m fr...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.11 s later. You may ignor...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. The driver of a car wishes to pass a truck that is traveling at a constant speed of 20.1 m/s . Initially, the car is also traveling at a speed 20.1...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. You are on the roof of the physics building, 46.0 m above the ground (Fig. P2.70). Your physics professor, who is 1.80 m tall, is walking alongside...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A helicopter carrying Dr. Evil takes off with a constant upward acceleration of 7.0 m/s2 . Secret agent Austin Powers jumps on just as the helicopt...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A ball is thrown straight up from the ground with speed v0. At the same instant, a second ball is dropped from rest from a height H, directly above...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. The engineer of a passenger train traveling at 25.0 m/s sights a freight train whose caboose is 200 m ahead on the same track. The freight train is...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A cheetah spots a Thomsons gazelle, its preferred prey, and leaps into action, quickly accelerating to its top speed of 30 m/s, the highest of any ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A cat is sleeping on the floor in the middle of a 3.4-m-wide room when a barking dog enters with a speed of 1.50 m/s. As the dog enters,...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A Porsche challenges a Honda to a 100-m race. Because the Porsches acceleration of 3.5 m/s2 is larger than the Hondas 3.0 m/s2, the Honda ge...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A rubber ball is shot straight up from the ground with speed v0 . Simultaneously, a second rubber ball at height h directly above the first ball is...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 56 km/s . To the crews great surprise, a Klingon ship is ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. David is driving a steady 27.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.50 m/s2 at the...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. As a science project, you drop a watermelon off the top of the Empire State Building, 320 m above the sidewalk. It so happens that Superman flies b...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Alan leaves Los Angeles at 8:00 a.m. to drive to San Francisco, 400 mi away. He travels at a steady 47.0 mph . Beth leaves Los Angeles at 9:00 a.m....

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Two cars are driving at the same constant speed on a straight road, with car 1 in front of car 2. Car 1 suddenly starts to brake with constant acce...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Amir starts riding his bike up a 200-m-long slope at a speed of 18 km/h, decelerating at 0.20 m/s2 as he goes up. At the same instant, Be...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A package is dropped at time t 5 0 from a helicopter that is descending steadily at a speed vi . (a) What is the speed of the package in terms of v...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A ball is thrown upward from the ground with an initial speed of 25 m/s at the same instant another ball is dropped from a building 15 m high. Afte...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A hockey player is standing on his skates on a frozen pond when an opposing player moving with a uniform speed of 12.0 m/s skates by with the puck....

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A motorist drives along a straight road at a constant speed of 15.0 m/s. Just as she passes a parked motorcycle police officer the officer starts t...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. A student at the top of a building of height h throws one ball upward with a speed of vi and then throws a second ball downward with the same initi...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Kathy tests her new sports car by racing with Stan an experienced racer. Both start from rest but Kathy leaves the starting line 1.00 s after Stan ...

Solved • Oct 29, 2018

Motion Of Multiple Objects

Q. Two students are on a balcony a distance h above the street. One student throws a ball vertically downward at a speed vi at the same time the other...

Solved • Oct 29, 2018