Conceptual Forces Indicate whether the following statements are always true or c

ID: 1655194 • Letter: C

Question

Conceptual Forces Indicate whether the following statements are always true or can be false:

a)If two objects are under the influence of equal forces, they have the same acceleration.

b) In order not to slow down, a truck moving at a constant velocity needs a small, non-zero net force applied.

c) If an object's speed does not change, the net force acting on the object is zero.

d) During the collision of a large truck with a car, the car exerts an equal size force on the truck as the truck exerts on the car.

e) The net force which acts on an object that remains at rest is zero.

f) If a non-zero net force acts on an object, the object's velocity will change.

(A) a = F / m

forces are equal but if masses are unequal then accelerations will be different.

False.

(B) a = Fnet / m

if Fnet is non-zero then there will also be a non-zero acceleration.

so it will either slow down or speed up.

False

F = m dv/dt

if there is change in velocity then there will be force.

if there is change in direction (even when speed is constant) then it means velocity is changing.

so there will be non-zero force.

False

(D) from Newton's 3rd law,

action-reaction force are same in magnitude but opposite in direction.

True

(E) if object is at rest and remains at rest .

so net force = 0

True

(f) non-zero force is acting then there will be change in momentum .

Ans: True

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.