Author: Anonymous

A roller coaster travels around a vertical 8-m radius loop. Determine the speed at the top of the loop if the normal force exerted by the seats on the passengers is equal to ¼ of their weight.

A flywheel with a radius of 0.15 m starts from rest and reaches an angular speed of 12.0. What is the wheel’s angular acceleration if it reaches this speed in 4.0 s?

A ball with momentum p strikes a wall and bounces off at the same speed. The change in the ball’s momentum is:

An object that is acted upon by a net force of 20 N is moving with an acceleration of 10 m/s2. What is the mass of the object?

A meter stick is supported at the 50-cm mark. A 0.40 kg mass is hanging at the 20 cm mark and a 0.60 kg hanging at the 80-cm mark. Where should a third mass that weighs 0.30 kg be hung to keep the stick balanced?

A car with a mass of 2000 kg is traveling at 10 m / s. What is the braking force needed to bring the car to complete stop in 5 seconds?

A 2,000-kg elevator is being accelerated upward at a rate of 3.0 m/s2. What is the tension in the cable?

A truck is driving over a scale at a weight station. When the front wheels drive over the scale, the scale reads 5800 N.  When the rear wheels drive over the scale, it reads 6500 N.  The distance between the front and rear wheels is 3.20 m Determine the distance between the front wheels and the truck’s center of gravity.   

The radius of the orbit of a certain asteroid is four astronomical units. What is the period (in years) of this asteroid?

A croquet mallet balances when suspended from its center of mass, as shown in the figure below. If the mallet is cut in two at its center of mass, how do the masses of the two pieces compare?