UCM

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up

• right

• down

• left

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

• outwards

• towards the center

• tangent

• faster

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

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

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

Centripetal acceleration is ...

• Acceleration toward the center of a curved or circular path

• Acceleration toward the outside of a circle

• Vertical motion instead of horizontal motion

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

Tags

NGSS.HS-PS2-1

The time taken for one complete circuit is called the... 

• Period

• Frequency 

• Angular velocity

During its trip a car of mass 1500kg is traveling around a corner as shown in the picture. The car rounds a corner of radius 100m at a speed of 15m/s. Find the centripetal force acting on the car.

• 300N

• 15000N

• 3375N

• 15N

Tags

NGSS.HS-PS2-1