A 10-kg package drops from a chute into a 25-kg cart with velocity of 3 m/s. Knowing that the cart is initially at rest and can roll freely, determine: (a) the final velocity of the cart,
(b) the impulse exerted by the cart on the package,
(c) the fraction of the initial energy lost in the impact.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

The slope of a velocity time graph over any interval of time gives the during that interval

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.