Uniform of Circular motion Quiz #3

A 0.65 kg ball is attached to the end of a string. It is swung in a vertical circle of radius 0.50 m. At the bottom of the circle its velocity is 2.8 m/s.

Solve those equations for the Tension in the string

*position of acceleration matter*

• 18 N

• 16.57 N

• 9.88 N

• 14.23 N

A 0.25 kg ball is attached to the end of a string. It is swung in a vertical circle of radius 0.60 m. At the top of the circle, its velocity is 3.0 m/s.

Solve those equations for the Tension in the string.

*position of acceleration matters and you know why*

• 0.45 N

• 1.8 N

• 2.45 N

• 1.3 N

A 0.25 kg ball is attached to the end of a string. It is swung in a vertical circle of radius 0.60 m. At the bottom of the circle, its velocity is 3.0 m/s.

Solve those equations for the Tension in the string.

*position of acceleration matters*

• 1.3 N

• 7.12 N

• 3.85 N

• 6.2 N

A ball is attached to the end of a string. It is swung in a vertical circle of radius 1.5 m. What is the minimum velocity that the ball must have to make it around the circle?

• 14.7 m/s

• 3.83 m

• 3.83 m/s

• 11.3 m/s

A ball is attached to the end of a string. It is swung in a vertical circle of radius 0.75 m. What is the minimum velocity that the ball must have to make it around the circle?

• 7.35 m/s

• 0.07 m/s

• 2.71 m/s

• 13 m/s

What is the equation for velocity relating to circular motion?

• Velocity squared= gravity x radius

• Velocity= square root of gravity x radius

• Velocity squared= square root of gravity x radius

• Velocity= gravity x radius

The occupants of a car traveling at a speed of 30 m/s note that on a particular part of a road their apparent weight is 15% higher than their weight when driving on a flat road.

Is that part of the road a hill or a dip? why?

• hill because their apparent weight physically feels higher so they feel lighter

• dip because their apparent weight physically feels higher so they feel heavier

• dip because their apparent weight physically feels lower so they feel lighter

• hill because their weight physically feels lower so they feel heavier

A person is walking up the hill. They begin to huff and puff halfway up the hill. What can we say about their apparent weight on the way up this hill?

• Their apparent weight is decreasing because they are going against the normal force

• Their apparent weight is increasing because they are going against gravity

• Their apparent weight is decreasing because they are going towards normal force

• Their apparent weight is increasing because they are going towards gravity

The occupants of a car traveling at a speed of 40 m/s note that on a particular part of a road their apparent weight is 30% lower than their weight when driving on a flat road.

What part of the road are these occupants traveling?

• flat road

• hill

• dip

• They are not driving