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- 1. Multiple Choice
If an object is spinning around on a string and the string was suddenly cut, the object would move in a
curved path
straight line
- 2. Multiple Choice
When an object is moving in a circle, its linear velocity is often called its __________ velocity.
centripetal
tangential
gravitational
centrifugal
- 3. Multiple ChoiceWhat happens to the centripetal force exerted on an object if you triple the velocity?it increases to 3Xit decreases to 6Xit increases to 6Xit increases to 9X
- 4. Multiple Choice
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
- 5. Multiple Choice
During its trip a car of mass 1500kg is traveling around a corner as shown in the picture. What actual force is equivalent to the centripetal force in this situation?
Tension
Friction
Centripetal force
gravity
- 6. Multiple ChoiceWhen an object is in circular motion it is constantly changing its velocity.TrueFalse
- 7. Multiple Choice
Why do objects experience centripetal acceleration even though they can have a constant speed?
Because they are speeding up as they move in a circle
Because they are constantly changing direction and hence, velocity changes, and that net change is directed inward.
Because they are constantly changing both speed and direction
Because when you have 100 people pedaling, you can speed up more easily.
- 8. Multiple ChoiceDecreasing the radius when making a turn allows you to____?Increase your frictionKeep a high speedChange your inertiaDecrease gravitational pull
- 9. Multiple ChoiceWhich statement is true about an object that is traveling in uniform circular motion?The speed of the object varies.The net force on the object is directed toward the center of the circular path.The direction of the object's velocity is constant.The net force on the object is directed away from the center of the circular path.
- 10. Multiple ChoiceThe velocity is always _____ to the line of a circle.outwardstowards the centertangentfaster
- 11. Multiple Choice
What's the centripetal force of a 0.2 kg yoyo spun in a circle with a radius of .7 meters at a velocity of 3 m/s?
2.05 N
2.57 N
2.90 N
3.13 N
- 12. Multiple Choice
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
- 13. Multiple ChoiceCalculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.10 N20 N30 N40 N
- 14. Multiple ChoiceWhich of the following depict the speed of the blowing ball?ABCD
- 15. Multiple ChoiceWhich represents the acceleration of the ball?ABCD
- 16. Fill in the Blank
The figure shows a coin on a turn-table is rotating at 1.0 r.p.s. The coefficient of static friction between the coin and the turn-table is 0.50. The maximum distance of the coin from the centre O of the turn-table for it to move in a circle is _____________.
- 17. Fill in the Blank
A 1.3 m long fishing line rated as "10 lb test" that can stand a force of 10 lb (44.48 N) is attached to a rock of mass 0.5 kg. The maximum speed at which the rock can be rotated without breaking the line is __________.
- 18. Fill in the Blank
An object is moving round a horizontal circle of radius 0.80 m, at a constant angular frequency of 20 rpm. The centripetal acceleration of the object is ___________.
- 19. Fill in the Blank
A particle moves in a horizontal circle of radius 0.60 m with a constant speed and a period of revolution of 0.02 s. The linear velocity of the particle is ____________.
- 20. Fill in the Blank
A particle moves in a horizontal circle of radius 0.60 m with a constant speed and a period of revolution of 0.02 s. The frequency of the revolution is _____________.
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