A ball is attached to a hanging string. You pull the ball to the side through an

Question

A ball is attached to a hanging string. You pull the ball to the side through an angle of 5 degree and release it at rest. It returns to its starting position every 2 seconds (there is no friction). How much time did it take the ball to first reach its largest speed, after you released it? 0.25 s 0.5 s 1 s 2 s 3 s 4 s A block attached to a massless spring oscillates without friction. Consider the block's maximum acceleration, |a_max|. If the oscillation frequency is doubled (and this is the only change made), what is the ratio of the new value of |a_max| to the original value? 1/4 1/Squareroot 2 1/2 Squareroot 2 2 4 it remains the same A massless spring hangs from the ceiling, upstretched. At the spring's lower end, a block is attached (without stretching the spring) and released at rest, after which it oscillates without friction. If the lowest point of the block's motion is 10 cm below where it was released, what is the oscillation amplitude? 5 cm 10 cm 15 cm 20 cm 30 cm 40 cm

Explanation / Answer

Since frequency is doubled , 'w' will also double

Therefore ratio of new acceleration and actual acceleration is 4. Option F is correct.

3. Since spring is initially unstreched therefore that is mean position of spring.It covered 10 cm below from that position.Therefore amplitude of oscillation is 10cm.Option B is correct.

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