1. Answer the following questions A. Which statement below is always true of an

Question

1. Answer the following questions

A. Which statement below is always true of an object in projectile motion?

There is acceleration in the x direction

Velocity at the highest point is zero

Acceleration in the y-direction is constant

Velocity in the x-direction is not constant

B. A long rod is constructed so that half of its length is made of lead and the other half is made of plastic. It can be rotated around either end. Which orientation will result in the greatest angular acceleration for the same torque?

1. rotation around lead end

2. rotation around plastic end

3. both the same

There is acceleration in the x direction

Velocity at the highest point is zero

Acceleration in the y-direction is constant

Velocity in the x-direction is not constant

Explanation / Answer

A.

Ans= Acceleration in Y-direction is constant ie. -g

B.

Ans= both the same

because T=I* alpha = I*a

alpha=T/I

I= Ml^2

mass will be same for both orientaion

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