Unit Test: Force and Laws of motion

Time: 1 hour 

M.M. 30 

Attempt all questions. 

Question numbers 1 to 5 carry 1 mark each. 
Question numbers 6 to 8 carry 2 marks each. 
Question numbers 9 to 11 carry 3 marks each. 
Question numbers 12 & 13 carry 5 marks each.

Q1: Which of the following objects is experiencing a balanced force?
(i) A book lying on a table
(ii) A ball rolling on the ground
(iii) A car accelerating on the highway
(iv) A stone falling freely from a height

Q2: The SI unit of force is __________. 

Q3: When two objects interact, they apply forces on each other that are __________ in magnitude and __________ in direction. 
(i) equal, opposite
(ii) equal, same
(iii) different, opposite
(iv) different, same

Q4: A car is moving in a straight line with a constant speed. Which of the following statements is true? 
(i) The forces acting on the car are balanced
(ii) The car is accelerating
(iii) The car is experiencing a net force
(iv) The car is slowing down

Q5: An object will continue in its state of rest or uniform motion unless acted upon by a __________.

Q6: Define force. Give one example of a force that can cause an object to start moving.

Q7: What happens to the direction of motion of an object when an unbalanced force acts on it? Give an example.

Q8: Why is it easier to push a shopping cart when it is empty than when it is full?

Q9: State Newton's Third Law of Motion. Give two examples where this law is observed in daily life. 

Q10: Explain how force can change the shape of an object with an example. 

Q11: Differentiate between balanced and unbalanced forces with an example for each.

Q12: Derive the mathematical formulation of Newton's Second Law of Motion. Explain how this law helps us understand the relationship between force, mass, and acceleration with the help of an example.

Q13: Explain the three laws of motion given by Newton with appropriate examples for each. 

You can find the solutions of this Unit Test here: ​Unit Test (Solution): Force and Laws of motion​​​