High School Physics › Work-Kinetic Energy Theorem
A arrow is fired from a bow whose string exerts an average force of
on the arrow over a distance of
. What is the speed of the arrow as it leaves the bow?
What is the work applied to a car when it is pushed
up along a
incline at a constant velocity.. Assume the coefficient of friction between the car and the ramp is
.
A rocket has a net propulsion force of
. Over a short period of time, the rocket speeds up uniformly from an initial velocity of
to a final velocity of
. Assume that the mass of the rocket remains constant even though it is burning fuel and that the net force is along the direction of travel. What is the net work done on the rocket in
?
A cat knocks a toy mouse across the floor with
of force. If the cat did
of work, how far did the mouse travel?
Rodrigo pushes a sofa down a long hallway. If the couch moves with a constant velocity, how much work does Rodrigo do?
At an accident science on a level road, investigators measure a car’s skid mark to be long. The accident occurred on a rainy day, the coefficient of friction was estimated to be
. What was the speed of the car when the driver slammed on and locked the brakes?
A book falls off the top of a
bookshelf. How much work is required to put the book back on the top of the bookshelf, assuming it is lifted with a constant velocity?
A bodybuilder lifts a weight upward
, and then returns it to its original position, all with a constant speed. What is the net work done on the weight?
Which of the following is an example of work?