5. [Ipt] Indicate whether the following statements are always true or can be fal

Question

5. [Ipt] Indicate whether the following statements are always true or can be false. (Select T-True, F-False. If the first is F and the rest T, enter A) During the collision of a car with a large truck, the truck exerts an equal size force on the car as the car exerts on the truck. B) If a NET force acts on an object, the object's velocity will change. C) The NET force which acts on an object which maintains a constant velocity is zero. D) If an object's speed does not change, no NET force is acting on the object. E) If two objects are under the influence of equal forces, they have the same acceleration F) A bicycle initially moving at a constant velocity will slow down unless a small NET force is applied.

Explanation / Answer

A) T - The truck and car exert equal and opposite forces on each other

B)T - if velocity changes,object has acceleration and hence force

C)T - since velocity is constant,acceleration is 0 and hence net force is zero

D)F - if the velocity(and not speed)does not change, then no net force is acting

E)F-acceleration is a function of mass of objects.If they have different masses,they will have different acceleration

F)F - To slow down,one needs to apply force in opposite direction to slow down

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