Centrifugal Force

Q. Difference between centrifugal force and centripetal force

Q.

What would happen to Earth, if the Sun suddenly vanishes? (Neglect the gravitational force due to other planets)

1. Earth will continue to orbit in the same manner

2. The Earth will fall down

3. The Earth will move straight along the direction of velocity at that time

4. The Earth will shatter into pieces

Q.

What are the uses/application and limitations of dimensional method

Q. What is the difference between centripetal force and centrifugal force ?

Q.

Distinguish between centripetal and centrifugal force.

Q.

The Earth is acted upon by the gravitation of the Sun though it does not fall into the Sun. Why?

Q. Consider a solid sphere of radius r and mass m which has a charge q distributed uniformly over its volume. The sphere is rotated about diameter with an angular speed omega . Give the relation between magnetic moment and the angular momentum of sphere.

Q.

The force used to dry clothes in a washing machine is

1. Centripetal Force which acts along the radius outwards

2. Centrifugal Force which acts along the radius inwards

3. Centripetal Force which acts along the radius inwards

4. Centrifugal Force which acts along the radius outwards

Q.

Which of the following is true regarding centrifugal force?

1. It is always directed towards the center around which the body is moving.

2. It is always directed away from the center around which the body is moving.

3. It is always directed tangentially to the radius with which the body is moving.

4. It is always directed at 60 degrees to the radius with which the body is moving.

Q.

Explain the working of centrifugal instrument in detail with respect to physics

Q.

To move a table with a constant velocity, a force of 300 N is required. What is the friction force that will be exerted on the table? (Please specify the answer in N)

1. 300 N

2. 400 N

3. 500 N

4. 0 N

Q.

The centripetal force acting on a mass of $m$ is $200N$, then___.(CPF - centripetal force, CFF - centrifugal force)

1. $\text{CFF is > 200 N}$

2. $\text{CFF = 0 N}$

3. $\text{CFF is also 200 N in terms of magnitude}$

4. $\text{CFF is < 200 N}$

Q.

The pair of centripetal and centrifugal force can be represented by___

1. Newton's 2nd law of motion

2. Newton's 3rd law of motion

3. Newton's 1st law of motion

4. first equation of motion

Q. A semicircular frame has two balls at the centre. The balls are free to move in the frame and no friction acts on it. Without moving the balls physically, how do you make both the balls positioned at the ends of the frame

1. By tilting the frame through 180 degrees on either side rapidly
2. By rotating the frame along an axis passing through the centre of the frame
3. By tilting the frame through 45 degrees on either side rapidly
4. None of these

Q. Neglecting the rotation of the earth , if suddenly the attractive power of the earth drops to zero, what would happen to a man standing on the earth?

Q.

Discuss the nature of centrifugal force.

Q. State whether true or false :
Centrifugal force is a real force.

1. True
2. False

Q.

Name any instrument that uses the principal of centrifugal force

Q. When you are driving a car and make a sudden turn, you get pushed to the other side. This is due to:

1. the centrifugal force acting on you
2. the gravitational force acting on you
3. the centripetal force acting on you
4. none of these

Q.

What are the advantages of centrifugal force

Q.

A trolley of mass 100g is given a velocity of 20cm/s with the help of a compressed spring. Calculate the PE stored in the compressed spring.

1. 0.02 J

2. 0.01 J

3. 0.001 J

4. 0.002 J

Q. The force responsible for drying of clothes in a washing machine is:

1. gravitational force
2. centripetal force
3. centrifugal force
4. electro-static force

Q. Statement-1: Centripetal and centrifugal forces cancel each other.
Statement-2: They are always equal and opposite.

1. Statement -1 is false, Statement- 2 is true.
2. Statement-1 is true, Statement-2 is true. Statement-2 is a correct explanation for statement-1.
3. Statement -1 is true, Statement-2 is false.
4. Statement-1 is true, Statement-2 is true. Statement-2 is not a correct explanation for statement-1.

Q. State whether true or false.
The centrifugal force and the centripetal force acting on a body are action-reaction pairs w.r.t. Newton's third law of motion.

1. True
2. False

Q. Question 10
The atmosphere is held to the earth by

(a) gravity
(b) wind
(c) clouds
(d) earth’s magnetic field

Q.

To move a table with a constant velocity, a force of 300 N is required. What is the friction force that will be exerted on the table? (Please specify the answer in N)

Q. Which of these is an application of centrifugal force?

1. Separating cream from milk
2. Riding a bike
3. Climbing a mountain
4. Sky diving

Q. Give an illustration for centrifugal force.

Q. An object placed with a rotating platform moves away from the centre due to

1. centripetal force
2. centrifugal force
3. wheel and axle
4. screw jack

Q.

A solid sphere of uniform density and radius 4 units is located with its centre at the origin O. Two spheres of equal radii 1 unit, with their centres at A (- 2, 0, 0) and B (2, 0, 0) respectively are taken out of the solid left behind spherical cavities as shown in the figure. Then choose the correct statement.

1. The gravitational force on the surface of the sphere is zero.

2. The gravitational force at point A (-2, 0, 0) is zero.

3. The gravitational force at point B (2, 0, 0) is zero.

4. The gravitational force due to this object at the origin is zero.