A 3000 kg truck is driving along a straight road at a constant speed of 60...

A 3000 kg truck is driving along a straight road at a constant speed of 60 km/hr. A 800 kg car starts accelerating from stationary as the truck goes past it. Ignore air resistance.

(a) How far has the truck travelled after 5 minutes? Give your answer in kilometres.

-2

(b) If the car accelerates at 6 ms
(c) How far will the car have travelled when it reaches this speed?
(d) What is the force associated with of motion of the car while it is accelerating?
(e) What is the force associated with the motion of the truck?

, how long until it is travelling at the same speed as the truck?

A 8 kg box is at the top of a smooth slope. It is initially stationary then slides down the slope and has a final velocity of 12 m/s. Ignore friction.

(a) How high was the box at the top of the slope?
(b) What potential energy does the box have half way down the slope?
(c) What is the kinetic energy of the box at the bottom of the slope?
(d) The moving box then hits a stationary object, and transfers all its energy to it. What work

was done on the object by the box?
(e) This new object travels 4.6 m before stopping. What is the force due to friction?

Solutions

Expert Solution

genius_generous answered 1 year ago

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