Blog

An object of mass m sits on a flat table.  The Earth pulls on this object with force mg, which we will call the action force.  What is the reaction force?

How many radians does a 0.300-m radius automobile tire rotate after starting from rest and accelerating at a constant angular acceleration of 2.00 rad/s2 over a 5.00-s interval?

A race car round a curve at 60 m/s. The radius of the curve is 400 m, and the  car’s mass is 6000 kg. What is the centripetal force acting on the car?  

You are standing in a moving bus, facing forward, and you suddenly fall forward as the bus comes to an immediate stop. What force caused you to fall forward?

A 5.0-C charge is 10m from a −2.0-C charge. The electrostatic force on the positive charge is: K = 8.9 x 109 N m2/C2

Your pet hamster sits on a record player whose angular speed is constant. If he moves to a point twice as far from the center, then his linear speed

True or False: A ball is dropped from the same height upon various flat surfaces. For the same collision time, impulses are smaller when the most bouncing take place.

Horses that move with the fastest linear speed on a merry-go-round are located

A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car.  Since a lot of damage is done on the car

A 2 kg mass has 40 J of potential energy with respect to the ground. How high is it above the ground?