UCM Practice

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

• 0.25 ms^-2
• 0.5 ms^-2
• 1 ms^-2
• 2 ms^-2

If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (Hint: C=2πr)

• 9.4 m/s
• 6.8 m/s
• 11.7 m/s
• 3.5 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

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

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

speed of its tires if their radius is 30 cm?

• 6 m/s

• 3 m/s

• 60 m/s

• 30 m/s

A toy car is following a circular path with a constant speed of v=3 m/s . If the radius of the circular path is 1 m, find The centripetal acceleration of the car

• 30 m/s²

• 3 m/s²

• 9 m/s²

• 6 m/s²

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

A rope attaches a tire to an overhanging tree limb. A girl swinging on the tire has a centripetal acceleration of 3.0 m/s². If the length of the rope is 2.1 m, what is the girl’s tangential speed?

• 3.5 m/s

• 2.5 m/s

• 8.5 m/s

• 12.5 m/s

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 m/s

• 73.3 m/s

• 24.4 m/s

• 1.0 m/s

A test car moves at a constant speed around a circular track. If the car is 75.0 m from the track’s center and has a centripetal acceleration of 19.6 m/s², what is the tangential speed?

• 1470 m/s

• 3.83

• 38.3

• 19.6