Motion

Question 1

What are the different types of motion?

Answer 1

The types of motion include translational, oscillatory, rotational, spin, and random motion.

Question 2

What is relative motion?

Answer 2

Relative motion is the motion of an object as observed from a particular reference point, taking into account the motion of both the object and the observer.

Question 3

What causes motion?

Answer 3

Motion is caused by the application of a force, which can be a push, pull, or force field like gravity or magnetism.

Question 4

What is the difference between speed, velocity, and acceleration?

Answer 4

Speed is the rate of change of distance, velocity is speed in a specific direction, and acceleration is the rate of change of velocity.

Question 5

What are the two main types of force?

Answer 5

The two main types of force are contact force (e.g., friction) and force field (e.g., gravitational force).

Question 6

What are the equations of uniformly accelerated motion?

Answer 6

The key equations are:
v = u + at
s = ut+ (1/2) at ^2
v ^2 = u^2 + 2as

Question 7

What is instantaneous velocity and acceleration?

Answer 7

Instantaneous velocity is the velocity of an object at a specific moment, and instantaneous acceleration is the acceleration at a specific moment.

Question 7

How does gravity affect motion?

Answer 7

Gravity causes objects to accelerate downward at a constant rate, typically
9.8 m/s ^ 2

Question 8

What do distance-time and velocity-time graphs represent?

Answer 8

Distance-time graphs show how distance changes over time, while velocity-time graphs show how velocity changes over time.

Question 9

How do you calculate the range of a projectile?

Answer 9

The range of a projectile is calculated using the formula:
Range = (𝑢2 sin 2𝜃)/ 𝑔
where 𝑢 is the initial velocity,
𝜃 is the angle of projection, and
𝑔 is the acceleration due to gravity.

Question 10

What are some applications of projectile motion?

Answer 10

Applications include sports (e.g., throwing a ball), artillery, and predicting the trajectory of missiles.

Question 11

What is inertia?

Answer 11

Inertia is the tendency of an object to resist changes in its state of motion.

Question 12

What is angular velocity?

Answer 12

Angular velocity is the rate of change of angular displacement, typically measured in radians per second.

Question 12

How is mass related to acceleration?

Answer 12

According to Newton’s second law, 𝐹 = 𝑚 × 𝑎
where 𝐹 is force,
𝑚 is mass, and
𝑎 is acceleration.
This means acceleration is inversely proportional to mass.

Question 13

What are centripetal and centrifugal forces?

Answer 13

Centripetal force is the force that keeps an object moving in a circle, directed towards the center. Centrifugal force is the apparent force that acts outward on a body moving around a center, arising from the body’s inertia.

Question 14

What does the area under a force-time graph represent?

Answer 14

The area under a force-time graph represents the impulse.

Question 14

What is the law of conservation of linear momentum?

Answer 14

The law states that the total momentum of a closed system remains constant if no external forces act on it.

Question 15

What are some applications of circular motion?

Answer 15

Applications include the operation of centrifuges, car tires on curved roads, and planetary orbits.

Question 15

What are centripetal and centrifugal forces?

Answer 15

Centripetal force is the force that keeps an object moving in a circle, directed towards the center. Centrifugal force is the apparent force that acts outward on a body moving around a center, arising from the body’s inertia.

Question 15

What is angular velocity?

Answer 15

Angular velocity is the rate of change of angular displacement, typically measured in radians per second.

Question 16

What is Simple Harmonic Motion?

Answer 16

S.H.M is a type of periodic motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.

Question 16

What are examples of systems that exhibit S.H.M?

Answer 16

Examples include a mass-spring system, a pendulum, and a vibrating tuning fork.

Question 17

How are period, frequency, and amplitude related to S.H.M?

Answer 17

The period is the time for one complete cycle, frequency is the number of cycles per second, and amplitude is the maximum displacement from the equilibrium position.

Question 18

How do velocity and acceleration change in S.H.M?

Answer 18

Velocity is maximum at the equilibrium position, and acceleration is maximum at the maximum displacement.

Question 19

What is the energy change in S.H.M?

Answer 19

In S.H.M, energy oscillates between kinetic energy (maximum at equilibrium) and potential energy (maximum at maximum displacement).

Question 20

What is resonance?

Answer 20

Resonance occurs when an external force drives a system at its natural frequency, causing the amplitude of oscillations to increase significantly.

Question 21

How do you solve problems involving impulse and momentum?

Answer 21

By applying the formula:
Impulse = Δ Momentum = 𝐹 × 𝑡

Question 21

What are Newton’s laws of motion?

Answer 21

1st: An object at rest stays at rest
2nd: 𝐹 = 𝑚 × 𝑎
3rd: For every action, there is an equal and opposite reaction.

Question 21

What are the applications of resonance?

Answer 21

Applications include musical instruments, bridges, and tuning circuits.