Questions and answers asked in physics S3 term 1?

1. What is the difference between speed and velocity?
- Speed is a scalar quantity that measures how fast an object is moving, while velocity is a vector quantity that measures both the speed and direction of an object's motion.

2. What is the formula for calculating acceleration?
- The formula for acceleration is acceleration = (final velocity - initial velocity) / time.

3. How does Newton's first law of motion relate to inertia?
- Newton's first law of motion states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an external force. This is related to the concept of inertia, which is the tendency of an object to resist changes in its motion.

4. What is the difference between mass and weight?
- Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity acting on an object's mass. Mass is measured in kilograms, while weight is measured in newtons.

5. How does the law of conservation of energy apply to a pendulum swinging back and forth?
- The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. In the case of a pendulum swinging back and forth, the potential energy at the highest point of the swing is converted into kinetic energy as the pendulum moves downward, and then back into potential energy as it swings back up. The total energy of the system remains constant throughout the motion.

Question 1: What is displacement?

- Answer: Displacement is the change in position of an object from its starting point.

Question 2: How is velocity related to displacement and time?

- Answer: Velocity is the rate of change of displacement with time, or v = d/t.

Question 3: What is the difference between speed and velocity?

- Answer: Speed is a scalar quantity that measures how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Question 4: What is acceleration?

- Answer: Acceleration is the rate of change of velocity with time, or a = dv/dt.

Question 5: What is Newton's first law of motion?

- Answer: Newton's first law, also known as the law of inertia, states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Question 6: What is the equation of motion for an object in constant acceleration?

- Answer: v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Question 7: What is the formula for kinetic energy?

- Answer: Kinetic energy = 1/2 mv², where m is the mass of the object and v is its velocity.

Question 8: What is the law of conservation of energy?

- Answer: The law of conservation of energy states that energy cannot be created or destroyed, only transferred or converted from one form to another.

Question 9: What is the difference between power and energy?

- Answer: Power is the rate at which energy is transferred or converted, while energy is the total amount of work that can be done.

Question 10: What is the equation for power?

- Answer: Power = Work done / Time taken