Multiple Choice. Select the best option. You do not need to show your work. A 20

Question

Multiple Choice. Select the best option. You do not need to show your work. A 20-ton truck collides with a 1500-b car and causes a lot of damage to the car. During the collision A) the force on the truck due to the collision is slightly greater than the force on the car B) the force of on the truck due to the collision is exactly equal to the force on the car C) the force on the car due to the collision is much greater than the force on the truck. D) the car and the truck have the same magnitude acceleration. A. 5 An object is moving to the right and experiencing a net force that is directed to the right. The magnitude of the force is decreasing with time. The speed of the object is A) increasing. B) decreasing. C) constant in time Point in the figure indicates the position of an object traveling at constant speed circle. Which ar were suddenly reduced to zero? row best represents the direction the object would travel if the net external force on i A) B) C) D) E)

Explanation / Answer

4. from newton's 3rd law,

action reaction forces have same magnitude and opposite direction.

So force on truck due car is equal to force on car due truck,

and a = F / m

greater the mass , less will be acceleration.

Ans(B)

5. Fnet = m a

net force is to the right, so acceleration will be to the right.

(force is decreasing but still is in right direction)

acceleration and velocity are in same direction.

so speed will increases.

Ans(A)

6. it will move tangential to path (Or velocity at that time)

Ans: (A)

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