Circular Motion Basics

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 ms^-1 in circle of radius 0.5 m. What is his acceleration?

• 0.25 ms^-2

• 1.3 ms^-2

• 1.6 ms^-2

• 0.74 ms^-2

Tags

NGSS.HS-PS2-1

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

• 3.9 ms^-1

• 73.3 ms^-1

• 24.4 ms^-1

• 1.0 ms^-1

What's the centripetal acceleration of an object traveling 2.3 ms^-1 around a circle of diameter 0.6 m?

• 5 ms^-2

• 17.63 ms^-2

• 10 ms^-2

• 8.81 ms^-2

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 ms^-2.

• 2.4 ms^-1

• 3.6 ms^-1

• 3.9 ms^-1

• 4.2 ms^-1

A bicycle has a period of 0.3s . What is the

speed of its tires if their radius is 30 cm?

• 6 ms^-1

• 3 ms^-1

• 60 ms^-1

• 30 ms^-1

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

• 0.1 s

• 0.2 s

• 0.3 s

• 0.5 s

A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the radius triples?

• 9.8?
• Force triples
• Force divides by 3
• Force divides by 9

A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the velocity triples?

• Nothing 
• The centripetal force triples
• the centripetal force multiplies by 9
• The centripetal force divides by 3

Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 ms^-1 if the ball weighs .12 kg and her arm is .65 meters long.

• 0.38

• 1.23

• 0.55

• 1.66 N

Tags

NGSS.HS-PS2-1

Calculate the centripetal force required to make a 5 kg ball move 4 ms^-1 in a circle with a radius of 2 m.

• 10 N

• 20 N

• 30 N

• 40 N

Tags

NGSS.HS-PS2-1