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MCQ Questions for CBSE Class 12 with Answers
MCQ Questions for CBSE Class 11 with Answers
MCQ Questions for CBSE Class 10 with Answers
MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
MCQ Questions for CBSE Class 7 with Answers
MCQ Questions for CBSE Class 6 with Answers
MCQ Questions for CBSE Class 5 with Answers
MCQ Questions for CBSE Class 4 with Answers
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Uniform Circular Motion Class 11 MCQ Questions With Answers
1.
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
2.
Which is true about centripetal force and centripetal acceleration?
The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force is always pointing outward
The centripetal acceleration is always pointing outward from the center of an orbit and the centripetal force is always pointing inward
The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force also pointing toward the center but in a totally different location
The centripetal acceleration is always pointing toward the center of an orbit and the centripetal force also pointing toward the center and in the same exact location as the centripetal acceleration
3.
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
4.
When an object is in circular motion it is constantly changing its velocity.
True
False
5.
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 __________.
10.75 ms-1
10.95 m/s
6.
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
7.
Which of the following depict the speed of the blowing ball?
A
B
C
D
8.
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
9.
Decreasing the radius when making a turn allows you to____?
Increase your friction
Keep a high speed
Change your inertia
Decrease gravitational pull
10.
An object is moving in a circle at constant speed. From this, you know that there
is no net force acting on the object
are two balanced forces acting
is an unbalanced force acting on the object
must be more than two forces acting on the object
11.
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 _____________.
0.124 m
0.135 m
12.
An object moves in a circle. The net force is 5.0 N. If the student doubles the speed, what force is needed? ΣFnet = mv2r\Sigma F_{net}\ =\ \frac{mv^2}{r}ΣFnet = rmv2
2.5 N
5.0 N
10.0 N
20.0 N
13.
A car moving around a curve at a constant speed of 150 mph is accelerating.
True, because it is moving at a constant speed.
True, because it is changing direction.
False, because it is not a constant velocity.
False, because it is moving at a constant speed.
14.
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 ___________.
3.53 rad s-1
3.73 rad/s
15.
When an object is moving in a circle, its linear velocity is often called its __________ velocity.
centripetal
tangential
gravitational
centrifugal
16.
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 ____________.
188.50 m/s
188.70 ms-1
17.
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
18.
Which of the following is the best description of what is being depicted (only one answer is correct)?
Tangential Velocity
Centripetal Acceleration
Axis of rotation
Angular velocity
19.
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.
20.
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
21.
Both centripetal force and centripetal acceleration are directed
away from a central point
toward a central point
tangent to the radius
opposite from each other
22.
A car makes a left turn, a book on the front seat slides to the right...why?
centripetal acceleration of the book
centripetal force of the book
will power
inertia of the book
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