1)     A book on a shelf has________energy

A) Kinetic          B) Potential          C) Mechanical          D) None of these

 

2)     If an object moves twice as fast, it has_____KE.

A)Same          B)Double          C)Quadruple          D)None of these

 

3)     If 3N of force do 12J of work, how far was something moved?

A)36m          B)4m           C).25m          D)none of these

 

4)     If m=2kg and v=3m/s, KE=___J

A)6              B).6             C)1.6           D)9

 

5)     30 watts for 10 minutes would use____J

A) 18000          B)300           C)3              D)none of these

 

6) I leave a 1000w appliance on for 10hrs.  1 kWh costs 10 cents.  Total cost

A)10cents          B)1cent          C)100cents          D)none of these

 

7)     If something (m=3kg) has 100J of KE, what is its velocity?

A) 8.2m/s          B) 66.6m/s          C) 33.3m/s          D) 300m/s

 

8)     F=3N, d=10m, t=2sec, p=?

A) 60w          B) 6.7w  C) 15w   D) none of these

 

9) m=2kg          a=2m/s/s          t=8sec        d=2m           p=___w

A) 1w           B) 64w   C) 16w   D) none of these

 

10) A 3Kg mass is accelerated at 2m/s/s in a distance of 4m.  How much work is done?

A)24J           B)1.5J          C)2.7J          D)none of these

 

11) A car does 10000J of work in 2sec.  Find power developed.

A)20000w          B)5000w          C).000005w                   D)none of these

 

12) A force of 10N moves a box 2m in 4sec.  Find power.

A)80w          B)5w            C).8w           D)none of these

 

13) A 100kg person is lifted to a height of 100m.  Find PE

A)98000J          B).98J          C)100J

 

14) If you lift an object up twice as high, you give it ___PE.

A)twice as much          B)four times as much          C)none

 

15) If you put 1000J worth of gas into a car, you can get ___ J out of the car.

A)up to 1000J           B)exactly 1000J           C)never as much as 1000J

 

16)What type of energy is inside a wound-up spring?

A)potential           B)kinetic          C)chemical            D)radiant

 

17)When a firecracker explodes, ___ energy is converted to sound, heat, light, etc.

A)kinetic          B)radiant          C)nuclear          D)chemical

 

18)The word that describes the relationship between input and output…

A)energy          B)effeciency          C)destruction          D)oatmeal

 

19)Someone falls off a swing. You can guess where they will hit the ground because you know how much __ they lost while falling, and how much __ they gained.

A)KE,PE          B)PE,KE          C)neither of these

 

20)One thing that contributes to the fact that you never get out what you put in is… A)friction          B)E=mc2          C)new shoes