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IB DP Physics Questions

2.2 Forces

Question 1

A car of mass 1,200 kg is moving with a constant velocity on a straight road. Which of the following statements is true regarding the forces acting on the car?

A. The net force acting on the car is zero.

B. The car is accelerating due to an unbalanced force.

C. The car is decelerating due to an external force.

D. The car is moving due to the absence of any forces.

Question 2

A box of mass 5 kg is subjected to a force of 10 N. What is the acceleration of the box?

A. 0.5 m/s^2

B. 1 m/s^2

C. 2 m/s^2

D. 10 m/s^2

Question 3

When you push a wall with a force of 50 N, how much force does the wall exert on you?

A. 0 N

B. 25 N

C. 50 N

D. 100 N

Question 4

A 10 kg object is subjected to two forces: 5 N to the right and 3 N to the left. What is the net force acting on the object?

A. 2 N to the right

B. 2 N to the left

C. 8 N to the right

D. 8 N to the left

Question 5

Which of the following is NOT an example of Newton's First Law in action?

A. A book resting on a table.

B. A ball rolling on a frictionless surface.

C. A car accelerating when the gas pedal is pressed.

D. A satellite orbiting Earth in space.

Question 6

a) Define Newton's First Law of Motion and explain its significance in understanding the concept of inertia. [3]

b) A book is placed on a table. Identify the forces acting on the book and explain how Newton's First Law is applicable in this scenario. [2]

Question 7

a) Describe the relationship between force, mass, and acceleration as stated by Newton's Second Law of Motion. [2]

b) A car of mass 1000 kg accelerates from rest to 20 m/s in 10 seconds. Calculate the net force exerted on the car during this time. [3]

Question 8

a) State Newton's Third Law of Motion and provide a real-world example illustrating this law. [2]

b) In a tug-of-war game, if team A exerts a force of 500 N to the right, what force does team B exert and in which direction? [2]

Question 9

a) Define inertia and explain how it is related to Newton's First Law of Motion. [2]

b) A 5 kg object is at rest on a frictionless horizontal surface. If a horizontal force of 10 N is applied to the object, calculate its acceleration. [2]

c) How long will it take for the object to reach a speed of 20 m/s starting from rest? [3]

Question 10

a) Differentiate between weight and mass. [2]

b) If an object has a mass of 50 kg, calculate its weight on Earth. (Use g = 9.81 m/s^2 for acceleration due to gravity) [2]

c) How would the weight of the object change if it were taken to the moon where the acceleration due to gravity is approximately 1/6th of that on Earth? [3]

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