You don\'t have to show your work i just need to compare the answers you get wit

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You don't have to show your work i just need to compare the answers you get with the answers that i got to see if i'm right.

16. Two partic es of equal mass m moving with equal speeds v along paths inclined at 60 to the x axis as shown, collide and stick together. Their velocity after the collision has magnitude (A) 4 (B) 2 (C) 2 (D) 2 (E) v 17. Why does a rocket accelerate when fired horizontally? A. Exhaust gases push against outside air B. Exhaust gases, which the rocket pushes backward, push the rocket forward C. Outside air exerts more force on the back of the rocket that on the front D. Exhaust speed is greater than the rocket speed E. Atmospheric pressure at the back of the rocket is reduced 18. When applying the condition for rotational equilibrium on a body, one sums the torques about an axIS A. passing through the center of mass of the body. B. passing through any point on the body C. passing through the geometrical center of the body D. passing through the line of action of the forces E. none of these. 19. A wheel of outer radius R has an axle of radius R/4. Strings are wrapped as shown around the rim of the wheel and around the axle. If the string around the rim of the wheel has tension T, then in order to keep the wheel from turning the tension in the string around the axle must be A. 4Tsine B. 4T C. TV4 D. T/4)sine 20. Consider the following statement: The center of gravity is always at the geometric center of an object. This statement is A. True B. False 21. Consider the following statement: An object is in equilibrium only if the sum of the forces acting on it is zero. This statement is A. True B. False 22. Moment of inertia describes A. The average position of the mass in an extended object. B. How the mass of an extended object is distributed about a rotation axis C. How a force can rotate an object. D. The tendency of an object to move in a straight line

Explanation / Answer

(16)

Correct option is (D)

(17)

Correct option is (B)

(18)

Correct option is (B).

The net torque on the object any axis of rotation should be zero,if the object is in rotational equilibrium.

(19)

Balance the torques

T*R =T'*R/4*

T'=4T

Correct option is (B)

According to guide lines first four parts have to answer.

Direct answers are provided as per student mentioned.

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