Free Printable Subtopic 6.1

Worksheets

Subtopic 6.1 - Circular Motion

Total questions: 20

Worksheet time: 3600secs

Name

Class

Date

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

Friction

Centripetal Force

Gravity

Inertia

What direction is the net force when the rollercoaster is at the top of the loop?

Towards the sky

Towards the Right

Towards the left

Towards the ground

If the ball is release at point A what direction will the object fly if the ball is revolving clockwise?

right

down

left

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

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

You are moving a ball in a circle using 72 N of centripetal force. What would the force be if you doubled the radius of the circle.

18 N

36 N

72 N

144 N

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

A car is going over the top of a hill whose curvature approximates a circle of radius 160 m. At what velocity will the occupants of the car appear to weigh 20% less than their normal weight (or their actual weight times 0.8)?

19.8 m/s

17.7 m/s

18.5 m/s

35.4 m/s

10.

What is 5π/6 radians in degrees?

180

150

360

120

11.

If the body is moving in a circle of radius r with a constant speed v, its angular velocity is

v²/ r

v / r

r / v

12.

A fan spins with a constant angular speed of 500 radians/second. How long will it take to cover an angle of 2π radians (one revolution)?

0.013 s

0.002 s

76.9 s

6.28 s

13.

A 0.50 kilogram object moves in a horizontal circular path with a radius of 0.25 meter at a constant speed of 4.0 meters per second. What is the magnitude of the object’s acceleration?

8 m/s²

32 m/s²

16 m/s²

64 m/s²

14.

If a rubber stopper completes 20 revolutions in 10 seconds, what is the period?

0.5 s

2 s

10 s

20 s

15.

An unbalanced force of 40 Newtons keeps a 5 kilogram object traveling in a circle of radius 2 meters. What is the speed of the object?

8 m/s

16 m/s

2 m/s

4 m/s

16.

In the diagram below, a cart travels clockwise at constant speed in a horizontal circle.

At the position shown in the diagram, which arrow indicates the direction of the velocity of the cart?

17.

In the diagram below, a cart travels clockwise at constant speed in a horizontal circle.

At the position shown in the diagram, which arrow indicates the direction of the centripetal acceleration of the cart?

18.

If the velocity of a car traveling around a circular track doubles, its centripetal acceleration would be

1/2 as great

1/4 as great

2 times greater

4 times greater

19.

A Particle starts moving in a circular path of radius 2m with initial speed 2m/s at constant angular acceleration. After 2 complete revolutions its speed becomes 8m/s. Find the angular acceleration of the particle.

15/4π

15/8π

15/π

None of the above

20.

With what maximum speed a car be safely driven along a curve of radius 40 m on a horizontal road, if the coefficient of friction between the car tyre and road surface is 1 ? (g = 10 m/s 2 )

10 m/s

15 m/s

20 m/s

25 m/s

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Subtopic 6.1 - Circular Motion

Total questions: 20

Worksheet time: 3600secs

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