[1pt] 8. Indicate whether the following statements are always true or can be fal

Question

[1pt] 8. 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) If two objects are under the influence of equal forces, they must have the same acceleration B) There is no difference between mass and weight. D) The net force which acts on an object which remains at rest is zero. E) If a net force acts on an object, the object's velocity will change. F) If an object's speed is constant, no net force is acting on the object

Explanation / Answer

8. (A) a = F / m

F is same but mass can be different.

so a can be different.

AnsL False

(B) these are different thing. (W = m g )

False.

(C) if it is moving then it will move with constant velocity.  

False

(d) object remains at rest means a = 0

hence F_net = m a = 0

True

(e) Fnet = m a

if there is force then a will be non-zero.

hecne velocity will change.

True

(f) Speed is constant but direction is changing that means velocity is changing.

hence a is non-zero so is force.

False.

(e.g. - circular motion with constant speed)

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