circular motion

Which of the following depict the speed of the blowing ball?

• A
• B
• C
• D

Which represents the acceleration of the ball?

• A
• B
• C
• D

Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.

• .38
• 1.23
• .55
• 1.66 N

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

• 5 m/s²

• 17.63 m/s²

• 10 m/s²

• 8.81 m/s²

You put a ball on the end of a string. You swing the ball with a rotation speed of 5.6 m/s. The mass of the ball is 2.0 kg. The length of the string is 1.60 m.

Calculate the centripetal acceleration.

• 19.6 m/s²

• 8.96 m/s²

• 3.50 m/s²

• 7.00 m/s²

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

Which of the following units is used for tangential velocity?

• m/s²
• N
• J
• m/s

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

A test car moves at a constant speed around a circular track.  If the car is 48.2 m from the track's center and has a centripetal acceleration of 8.05 m/s², what is the car's tangential speed?

• 19.7 m/s
• 5.99 m/s
• 0.17 m/s
• 388.01 m/s