1.) A child whirls a ball in a vertical circle. Assuming the speed of the ball i

Question

1.) A child whirls a ball in a vertical circle. Assuming the speed of the ball is constant (an approximation) , when would the tension in the cord connected to the ball be greatest?

A.) A little before the bottom of the circle when the ball is descending quickly.

B.) A little after the bottom of the circle when the ball is climbing.

C.) At the bottom of the circle.

2.) Which pulls harder gravitationally, the Earth on the Moon, or the Moon on the Earth? Which accelerates more?

A.) Both the same; the Moon.

B.) Both the same; the Earth.

C.)The Moon on the Earth; the Moon.

D.) The Earth on the Moon; the Earth.

Explanation / Answer

1) --> C (maximum tension when maximum centripetal accileration. i.e at the bottom when velocity is maximum. )
2) --> A (gracitational forces are equal and opposite but moon having a lighter mass will have more accileration)

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

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