How does conservation of energy explain why something that is falling should speed up? O It loses kinetic energy because no work was done on it. O It loses kinetic energy because the Earth gains potential energy. O It gains kinetic energy because it gains potential energy. O It gains kinetic energy because it loses potential energy.

How does conservation of energy explain why something that is falling should speed up? O It loses kinetic energy because no work was done on it. O It loses kinetic energy because the Earth gains potential energy. O It gains kinetic energy because it gains potential energy. O It gains kinetic energy because it loses potential energy.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

IV,1 K/s A 300-g object slides 80 cm in a straight line along a horizontal tabletop. How much work is done in overcoming friction between the object and the table if the coefficient of kinetic friction is 0.20? * 47 J 4.7 J - 4.7 J 0.47 J -0.47 J An 8000-kg engine pulls a 40 000- kg train along a level track and gives it an acceleration 2.4 m/s^2. What be the acceleration would the engine give to a 16 0o0-kg train? * 2.3 m/s^2 2.4 m/s^2 2.5 m/s^2 -2.3 m/s^2
question 5
A woman swimming upstream is not moving with respect to the shore. Is she doing any work? If she stops swimming and merely floats, is work done on her? Explain comprehensively.
You stand at the top of a cliff and lower a first aid kit (attached to a rope) down the cliff to an injured hiker at a constant speed. What can you say about the work done by the rope and the work done by gravity on the kit as it is lowered? O The work done by the rope is positive and the work done by gravity is positive. The work done by the rope is negative and the work done by gravity is negative. O The work done by the rope is positive and the work done by gravity is negative. O The work done by the rope is zero and the work done by gravity is zero. O The work done by the rope is negative and the work done by gravity is positive.
a. (i) Give an example of an object that has three forces acting on it, and (1) accelerates, (2) moves at constant (nonzero) velocity, and (3) remains at rest. (ii) In terms of work done distinguish between conservative and non-conservative force.
Can the work done by Friction be zero? In a case where static friction exists, the object does not move and the change in kinetic energy is also zero? W = Fd = ?KE = 0? What did I do wrong?
In an amusement park, two identical cars, moving with speeds of the same value, same direction and opposite directions, collide head-on and stop immediately after impact. Comparing the kinetic energy and the amount of movement of the system constituted by the two carts, before and after the collision, it is correct to state that: . a) both increased . b) the kinetic energy remained constant and the amount of movement decreased. c) both decreased. d) both remained constant. e) the kinetic energy decreased and the amount of movement remained constant.
60. III You are driving your 1500 kg car at 20 m/s down a hill with a 5.0° slope when a deer suddenly jumps out onto the road- way. You slam on your brakes, skidding to a stop. How far do you skid before stopping if the kinetic friction force between your tires and the road is 1.2 × 104 N? Solve this problem using work and energy.
0 Question 3 A block of mass m = 1 kg is sliding on a horizontal surface with initial velocity vo = 2 m/s. The block is brought to a stop by kinetic friction in a distance of 4 m. What is the work done by the force of friction acting on the block? 2J O-0.5 J O-2 J 08 J 0.5 J O-8 J 1 pts Question 4 1 pts
What is the correct answer for this? I answered triple but it is WRONG. Please provide an explanation for this. Thanks much!
You push on a box of 10?? with a force F = (20i −10j )N. It moves on a rough surface (uc=0.1) over 2m. Calculated... 1- the normal force module that acts on the body2- the work done by the force you exert3- the work done by the weight of the crate4- the work done by the force of friction
Find the work done in joules by gravity as an object of the mass m 5 kg is raised up at constant speed from a height h;=26 m to a height h2=69 m. Consider g = 10 m/s2 A. None B. -2150 D. -6450 E. -4300 O < O a OUO DOE