Pushing a Cat. Your cat "Ms." (mass 7.00 kg) is trying to make it to the top of a frictionless ramp 2.00 m long and inclined upward at 30.0 degree above the horizontal. Since the poor cat can't get any traction on the ramp, you push her up the entire length of the ramp by exerting a constant 100-N force parallel to the ramp.

If Ms. takes a running start so that she is moving at 2.40 m/s at the bottom of the ramp, what is her speed when she reaches the top of the incline? Use the work-energy theorem.

Solution Summary

This solution gives step by step calculations for a question that utilizes the work-energy theorem.

On a frozen pond, a 10.6 kg sled is given a kick that imparts to it an initial speed of V(0) = 1.73 m/s. The coefficient of kinetic friction between the sled and the ice is mu(k) = 0.102. Use the work-kinetic energy theorem to find the distance the sled moves before coming to rest.

Question: A 16-kg sled is being pulled along the horizontal snow-covered ground by a force of 24 N. Starting from rest, the sled attains a speed of 2.0 m/s in 8.0 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

When an average force F is exerted over a certain distance on a shopping cart of mass m, its kinetic energy
increases by 12 mv2.
(a) Use thework-energytheorem to show that the distance over which the force acts is mv2/2F.
Am I on the right track? UGH so very frustrated!
Kinetic energy = 1/2 mass x speed2
KE = 1/

A pitcher throws a baseball with mass=.145kg straight up with initial v=25 m/s
a) How much work has gravity done on the ball when it reaches h=20m above pitcher's hand?
b) Usingwork-energytheorem, calculate speed of baseball at h=20m above pitcher's hand
c) Does the answer to part b depend on weather the ball is moving up

In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 25000 V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into account. Ignoring such effects, what is the electr

Set up a short problem related to your work environment to calculate the probability(ies) of an event happening. Then use Bayes' Theorem to revise the probability. Show all your work.

An old fashioned perfume atomizer operates by the user squeezing a bulb which sets up a rapid flow of air through a horizontal tube. The reduction in pressure due tothis rapid flow causes perfume to be sucked up a vertical tube from the bottle and then expelled from the horizontal tube along with the air. For simplification, we

An electric winch pulls a 30.9 kg case of soap up a roller incline 3.01 m high in 3.15 seconds. The case starts from rest at the bottom and is moving 4.02 m/s at the top of the incline. The force of friction on the box is 39.4 N.
a) What is the increase in gravitational potential energy of the box?
b) Calculate the length