circular motion

A satellite of mass m and speed v orbits the Earth at a distance r from the center of the Earth. The gravitational acceleration due to the Earth at the satellite is equal to.

• v/r

• v²/r

• mv/r

• mv²/r

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

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

Centripetal force is...

• the inward force acting on a body moving at constant speed in a circle

• the outwards force acting on a body moving at constant speed in a circle

Centripetal acceleration acts towards the ___________ of the circular motion

• centre
• circumference

Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s

• 4.1 kg
• 3.6 kg
• 2.5 kg
• 1.8 kg

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

Bentley the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his centripetal acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²

moving or tending to move toward a center...

• centripetal force

• centrifugal force

• Tangent

• Curvature

Centripetal force is...

• the resultant force acting on a body moving at constant speed in a circle

• the outwards force acting on a body moving at constant speed in a circle