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Mechanics and Kinematics in Physics Quiz

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#1

1. Which of the following is a scalar quantity?

Distance
Explanation

Quantity with only magnitude.

#2

2. If an object is in equilibrium, what can be said about the sum of forces acting on it?

The sum of forces is zero.
Explanation

Net force acting on the object is balanced.

#3

8. What is the SI unit of torque?

Newton-meter
Explanation

Measure of rotational force.

#4

9. Which of the following is a vector quantity?

Acceleration
Explanation

Quantity with magnitude and direction.

#5

15. Which law of motion is described by the statement: 'For every action, there is an equal and opposite reaction'?

Newton's Third Law
Explanation

Reciprocal forces between interacting objects.

#6

18. What is the unit of angular velocity?

Radian
Explanation

Angle covered per unit time.

#7

3. What is the formula for calculating average speed?

Speed = Distance / Time
Explanation

Rate of motion over time.

#8

4. In projectile motion, what is the horizontal component of velocity?

Tangential velocity
Explanation

Velocity along the direction of motion.

#9

6. What is the work done by a force when the displacement is perpendicular to the force?

Zero work
Explanation

No energy transfer.

#10

7. In circular motion, what is the centripetal force responsible for?

Changing direction
Explanation

Force that keeps an object moving in a circle.

#11

12. What is the relationship between the frequency (f) and the period (T) of a wave?

f = 1/T
Explanation

Inverse relationship between frequency and period.

#12

13. According to Kepler's laws of planetary motion, what is the shape of a planet's orbit?

Ellipse
Explanation

Oval-shaped path.

#13

5. According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?

Force = Mass × Acceleration
Explanation

Acceleration of an object is directly proportional to the force applied.

#14

10. What does the term 'inertia' refer to in physics?

Resistance to motion
Explanation

Tendency of objects to resist changes in motion.

#15

11. What is the conservation law associated with the total mechanical energy of a system?

Law of Conservation of Energy
Explanation

Energy within a closed system remains constant.

#16

14. What is the formula for calculating gravitational potential energy?

PE = GmM/r
Explanation

Energy due to an object's position in a gravitational field.

#17

19. Which law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted?

First law
Explanation

Conservation of energy principle.

#18

20. What is the formula for calculating the centripetal acceleration of an object moving in a circle?

a = v^2/r
Explanation

Acceleration towards the center of a circular path.

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