# MDCAT PHYSICS QUIZ 3- TEST NO 3

MEDICO EXPERT TEST SERIES 2023

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1. How is angular displacement calculated?

a) By dividing the total angle covered by the time taken

b) By subtracting the final angle from the initial angle

c) By adding the final angle to the initial angle

d) By multiplying the final angle by the initial angle

2. If an object rotates through 3π/4 radians, what is its angular displacement?

3. What is the difference between angular displacement and linear displacement?

a) They are the same thing

b) Angular displacement is the change in angle covered by an object, while linear displacement is the change in position of an object along a straight line.

c) Angular displacement is the change in position of an object along a straight line, while linear displacement is the change in angle covered by an object.

d) None of the above

4. If a wheel with a radius of 0.5 meters rotates at an angular velocity of 10 radians per second, what is its linear velocity?

a) 0.5 m/s                b) 5 m/s                c) 10 m/s              d) 20 m/s

5. What is the SI unit of linear velocity?

a) Meters per second (m/s)      b) Radians per second (rad/s)            c) Newtons per meter (N/m)        d) Kilograms (kg)

6. What is the relationship between angular velocity and linear velocity?

a) They are the same thing

b) Angular velocity is equal to linear velocity multiplied by the radius of rotation

c) Linear velocity is equal to angular velocity multiplied by the radius of rotation

d) None of the above

7. What is angular velocity?

a) The rate of change of angular displacement

b) The rate of change of linear displacement

c) The rate of change of angular acceleration

d) The rate of change of linear acceleration

8. What is the relationship between centripetal force and velocity of the object?

a) Centripetal force is directly proportional to the velocity of the object

b) Centripetal force is inversely proportional to the velocity of the object

c) There is no relationship between centripetal force and velocity of the object

d) Centripetal force is equal to the velocity of the object

9. What is the relationship between centripetal force and mass of the object?

a) Centripetal force is directly proportional to the mass of the object

b) Centripetal force is inversely proportional to the mass of the object

c) There is no relationship between centripetal force and mass of the object

d) Centripetal force is equal to the mass of the object

10. What happens to the centripetal force required for an object to move in a circular path if the speed of the object is doubled?

a) It doubles

b) It becomes half

c) It becomes one-fourth

d) It becomes four times

11. What is the direction of centripetal force?

a) Tangential to the circular path

b) Radial, towards the center of the circular path

c) Opposite to the direction of motion

d) None of the above

12. What happens to the centripetal force required for an object to move in a circular path if the radius of the circle is doubled?

a) It doubles

b) It becomes half

c) It becomes one-fourth

d) It becomes four times

13. What is centripetal force?

a) The force that causes an object to move in a straight line

b) The force that causes an object to move in a circular path

c) The force that opposes the motion of an object

d) The force that changes the direction of an object

14. What is the maximum speed at which a car of mass 500 kg can safely take a turn of radius 100 meters on a frictionless road?

a) 10 m/s

b) 20 m/s

c) 30 m/s

d) 40 m/s

15. What is the SI unit of centripetal force?

a) Newtons (N)

b) Joules (J)

c) Watts (W)

d) Volts (V)