Uniform Circular Motion

If the period of an object in uniform circular motion is 10 seconds and the radius of the circle is 15 meters, what is the centripetal acceleration?

• 0.56 m/s²

• 1.5 m/s²

• 0.75 m/s²

• 2.0 m/s²

If the speed of an object in uniform circular motion is doubled, what happens to the centripetal acceleration?

• It is halved

• It remains the same

• It is doubled

• It is quadrupled

A car travels around a circular track with a radius of 100 meters at a constant speed of 20 m/s. What is the centripetal acceleration of the car?

• 4 m/s²

• 2 m/s²

• 8 m/s²

• 10 m/s²

Tags

NGSS.HS-PS2-1

A 0.5 kg ball is attached to a string and swung in a horizontal circle with a radius of 1.2 meters at a speed of 5 m/s. What is the tension in the string?

• 10.4 N

• 12.5 N

• 20.8 N

• 25.0 N

Tags

NGSS.HS-PS2-1

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

Tags

NGSS.HS-PS2-1

The velocity is always _____ to the line of a circle. 

• outwards

• towards the center

• tangent

• faster

If a satellite orbits Earth in a circular path with a radius of 1.0 x 10^7 meters and takes 24 hours to complete one orbit, what is its tangential speed?

• 2.6 x 10^3 m/s

• 1.5 x 10^3 m/s

• 3.0 x 10^4 m/s

• 1.2 x 10^2 m/s

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A cyclist is making a turn on a circular track with a radius of 50 meters. If the cyclist’s speed is 8 m/s, what is the magnitude of the centripetal force if the cyclist has a mass of 70 kg?

• 448 N

• 112 N

• 560 N

• 320 N

Tags

NGSS.HS-PS2-1

An object is moving in a circular path with a radius of 10 meters and an angular velocity of 2 rad/s. What is the centripetal acceleration?

• 4 m/s²

• 20 m/s²

• 40 m/s²

• 10 m/s²

A 0.8 kg ball is swung in a circle of radius 2 meters at a speed of 4 m/s. What is the centripetal force acting on the ball?

• 6.4 N

• 8.0 N

• 12.8 N

• 16.0 N

Tags

NGSS.HS-PS2-1