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