Free Printable Ch6 Uniform Circular Motion

Worksheets

Ch6 Uniform Circular Motion

Total questions: 20

Worksheet time: 37mins

Name

Class

Date

At the instant shown in the diagram, the car's centripetal acceleration is directed-

toward E

toward N

toward W

clockwise

At the position shown in the diagram, which arrow indicates the direction the instantaneous (tangential) velocity of the cart?

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

What object experiences uniform circular motion?

A car speeding up as it turns left

A car traveling around a roundabout at a constant speed

A car slowing down as it crests a tall hill

A car traveling down the road at a constant speed

A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s. What is the radius of the loop?

203 m

8163 m

80,003 m

23 m

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

When an object is moving in a circle, its linear velocity is often called its __________ velocity.

centripetal

tangential

gravitational

centrifugal

What happens to the centripetal force exerted on an object if you triple the velocity?

it increases to 3X

it decreases to 6X

it increases to 6X

it increases to 9X

10.

A horse gallops around a circular arena. The centripetal force on the horse is ___.

directed outward

tension

directed toward the center of the arena

9.8 N

11.

An engineer is planning a road with a turn. If the speed limit is 20 m/s and the centripetal acceleration cannot exceed 8.5 m/s/s, how big must the radius of the turn be?

2.4 m

47 m

170 m

3400 m

12.

Why should you reduce speed around a turn if the road is icy?

Because your car will travel in a straight line unless forced to do otherwise

Because the ice reduces the frictional force between the tires and the road.

Because a minimum amount of centripetal force is required to keep your car moving around the curve.

All of the above.

13.

A 1750-kilogram car travels at a constant speed of 15.0 meters per second around a horizontal, circular track with a radius of 45.0 meters. The magnitude of the centripetal force acting on the car is

5.00 N

583 N

8750 N

3.94 × 10⁵ N

14.

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?

8.0 m/s²

16 m/s²

32 m/s²

64 m/s2

15.

Which of the following is Newton's Law on Gravitation?

F=Gm₁m₂/r

F = Gm₁m₂/r²

F = Gm₁m₂/2r

F = m₁m₂/2r

16.

Centripetal force, created by swinging something in a circle, acts in a direction--

along the path of motion

away from the center of the circle

toward the center of the circle

tangent to the circle

17.

Two factors effecting the magnitude of the force of gravity between 2 objects are...

mass and distance

mass and matter

distance and weight

weight and mass

18.

Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull.

3 N

0.0003 N

3000 N

30 N

19.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

2.96x10^-7N

3.00x10^-6N

2.22x10^-9N

2.23x10^-8N

20.

Two objects each have masses of 4500 kg and are .03 meters apart from each other. What's their force of gravity?

.3 N

.7 N

1.1 N

1.5 N

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Ch6 Uniform Circular Motion

Total questions: 20

Worksheet time: 37mins

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