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`IB DP Physics Questions`

Question 1

**A force of 10 N is applied to move a box 5 meters in the direction of the force. How much work is done on the box?**

A. 2 J

B. 10 J

C. 50 J

D. 100 J

Question 2

**Which of the following is a scalar quantity?**

A. Force

B. Velocity

C. Displacement

D. Work

Question 3

**A ball of mass 2 kg is raised to a height of 5 meters above the ground. What is its potential energy relative to the ground? (Assume g = 10 m/s^2)**

A. 10 J

B. 25 J

C. 50 J

D. 100 J

Question 4

**A car of mass 1000 kg is moving with a speed of 20 m/s. What is its kinetic energy?**

A. 2 x 10^5 J

B. 2 x 10^4 J

C. 1 x 10^5 J

D. 1 x 10^4 J

Question 5

**Which of the following statements about energy conservation is true?**

A. Kinetic energy can be converted to potential energy, but not vice versa.

B. Energy can neither be created nor destroyed.

C. Only potential energy is conserved in a closed system.

D. Energy is always lost as heat in any transformation.

Question 6

**a)** Define the term "work" in the context of physics. How is it calculated? [2]

**b)** A force of 50 N is applied to a box, causing it to move a distance of 4 m in the direction of the force. Calculate the work done on the box. [2]

Question 7

**a)** Differentiate between kinetic energy and potential energy, providing an example for each. [3]

**b)** A 5 kg object is lifted to a height of 10 m above the ground. Calculate its gravitational potential energy. (Assume g = 9.81 m/s^2) [2]

Question 8

**a)** Define "power" in terms of work and time. [2]

**b)** If a machine does 600 J of work in 10 seconds, what is its power output? [2]

Question 9

**a)** Explain the principle of conservation of energy. [2]

**b)** A 3 kg ball is dropped from a height of 20 m. Calculate its potential energy at the start. [2]

**c) **Using the conservation of energy principle, determine the kinetic energy of the ball just before it hits the ground. [3]

Question 10

**a)** Define Newton's second law of motion and explain its relation to work. [3]

**b)** A force of 10 N acts on a 2 kg object, causing it to accelerate. Calculate the acceleration of the object. [2]

**c)** If the object moves a distance of 5 m under this force, determine the work done on the object. [2]

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