1. State Assessment Review 2.HS.2B.2.2

2.  work – the transfer of energy to a body by the application of a force that causes the body to move in a direction parallel to the direction of the force  Work may be positive or negative.  Negative work decreases the objects energy.  work = force x distance  1 joule = 1N x 1m

3.  power – the rate which work is done or the rate at which energy of a system changes  power = work/time  1 watt = 1J / 1s

4.  energy – the ability to do work  1. potential energy – energy of position  gravitational potential energy – energy that could potentially do work that results from its position above the ground  PE = mgh  PE is measured in Joules.

5.  2. kinetic energy – energy of an object due to motion  KE = ½(mv 2 )

6. Questions  1. What type of energy best describes a car parked at the top of a hill?  A. potential energy  B. kinetic energy  C. chemical energy  D. electrical energy

7. Questions  1. What type of energy best describes a car parked at the top of a hill?  A. potential energy – correct answer  B. kinetic energy  C. chemical energy  D. electrical energy

8.  2. Choose the scenario in which the most work is done.  A. A book is pushed off of a table and lands on the floor.  B. A man pushes on a file cabinet, but cannot make it move.  C. A weightlifter bench presses 200 kg.  D. A bowling ball is dropped and hits the floor.

9.  2. Choose the scenario in which the most work is done.  A. A book is pushed off of a table and lands on the floor.  B. A man pushes on a file cabinet, but cannot make it move.  C. A weightlifter bench presses 200 kg. – correct answer  D. A bowling ball is dropped and hits the floor.

10.  3. A 100 kg person walks up a flight of stairs and another 100 kg person runs up the same flight of stairs. Choose the following statement that best describes this situation.  A. The power is the same in both instances but more work is done when the person runs up the stairs.  B. The power is the same in both instances but more work is done when the person walks up the stairs.  C. The work done is the same in both instances but more power is generated when the person walks up the stairs.  D. The work done is the same in both instances but more power is generated when the person runs up the stairs.

11.  3. A 100 kg person walks up a flight of stairs and another 100 kg person runs up the same flight of stairs. Choose the following statement that best describes this situation.  A. The power is the same in both instances but more work is done when the person runs up the stairs.  B. The power is the same in both instances but more work is done when the person walks up the stairs.  C. The work done is the same in both instances but more power is generated when the person walks up the stairs.  D. The work done is the same in both instances but more power is generated when the person runs up the stairs. – correct answer

12.  4. Looking a the figure below, if the pendulum ball begins at the position labeled 1, where will the kinetic energy be the greatest?  A. 1  B. 2.  C. 3  D. 5

13.  4. Looking a the figure below, if the pendulum ball begins at the position labeled 1, where will the kinetic energy be the greatest?  A. 1  B. 2.  C. 3 – correct answer  D. 5

14.  5. Looking a the figure below, if the pendulum ball begins at the position labeled 1, where will the kinetic energy and the potential energy be nearly equal?  A. 1 and 5  B. 2 and 4  C. 3 and 1  D. 5 and 4

15.  5. Looking a the figure below, if the pendulum ball begins at the position labeled 1, where will the kinetic energy and the potential energy be nearly equal?  A. 1 and 5  B. 2 and 4 – correct answer  C. 3 and 1  D. 5 and 4