..

   

 

 

Physics problems: kinematics

Part 11

 

Problem 101.

A particle is moving eastwards with a velocity 5 m/s, changes its direction northwards in 10 seconds and moves with the same magnitude of velocity.  Find the average acceleration of the particle.

Solution

 

Problem 102.

A car traveling at a constant speed of 30 m/s passes a highway patrol car, which is at rest. The police officer accelerates at a constant rate of  and maintains this rate of acceleration until he pulls next to the speeding car. Assume that the police car starts to move at the moment the speeder passes the police car. What is the time requires for the police officer to catch the speeder?

Solution

 

Problem 103.

A man walks 9 km east and then 12 km north.  What is the magnitude of his resultant displacement?

Solution

 

Problem 104.

To get from one office to another, one travels as follows (with all angles measured clockwise from the West) 2 m at  , 0.5 m at , and 1 m at . How far will a person be from his starting point?

Solution

 

Problem 105.

A student throws his test paper up in the air (neglecting air resistance) with an initial speed of 8.10 m/s. How long does it take until the paper is headed downward at a speed of 3.23 m/s?

Solution

 

Problem 106.

A ball is thrown upward from the top of a 31.0 m tower on an unknown planet (gravitational acceleration is unknown) with an initial speed of 12.0 m/s and hits the ground with a speed of 52.0 m/s. How long was the ball in flight?

Solution

 

Problem 107.

A skier leaves the end of a horizontal ski jump at 22.0 m/s and falls 3.20 m before landing. Neglecting friction, how far horizontally does the skier travel in the air before landing?

Solution

 

Problem 108.

Billy jogs 2.5 km east in 45 minutes, takes a water break for 12 minutes, and then walks west at a rate of 0.65 km/hr for 30 min. What is Billy's average velocity? (Answer units: km/hr)

Solution

 

Problem 109.

Billy jogs 2.5 km east in 45 minutes, takes a water break for 12 minutes, and then again walks east at a rate of 0.65 km/hr for 30 min. What is Billy's average velocity? (Answer units: km/hr)

Solution

 

Problem 110.

Billy now wants to throw a ball at 55 degrees above the horizontal axis to Samantha, who is hanging from her apartment winder 25.0 m above the ground. Her apartment is 45.0 m away from Billy. What initial speed must Billy throw the ball so Samantha can catch it?

Solution

 

 

 

 

 

Find your problem in a database of solved Physics Problems (FREE)

..
Copyright © solvephysics.com 2016. All rights reserved.