This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which has more mass, a kilogram of feathers or a kilogram of iron? A) The feathers. B) The iron. C) Neither. D) It depends. Show Answer Correct Answer: C) Neither. 2. Speed plus direction: A) Inertia. B) Velocity. C) Acceleration. D) Force. Show Answer Correct Answer: B) Velocity. 3. Which of the following objects has the least acceleration? A) An empty shopping cart pushed with a hard force. B) A full shopping cart pushed with a hard force. C) An empty shopping cart pushed with a light force. D) A full shopping cart pushed with a lightforce. Show Answer Correct Answer: D) A full shopping cart pushed with a lightforce. 4. What is the formula for momentum? A) Distance/ Speed = Momentum. B) Mass x Speed = Momentum. C) Mass x Velocity = Momentum. D) None of the above. Show Answer Correct Answer: C) Mass x Velocity = Momentum. 5. Inertia is defined as ..... A) Property of mass to change the motion. B) Property of mass to accelerate. C) Property of mass to remain at rest. D) None of the option. Show Answer Correct Answer: B) Property of mass to accelerate. 6. A karate player breaks the pile of the tiles or bricks with a single blow. Which law is applied here? A) First law. B) Second law. C) Third law. D) None of the above. Show Answer Correct Answer: B) Second law. 7. When a carpet is beaten with a stick, dust particle comes out. This phenomenon is an example of ..... law of motion. A) 1. B) 2. C) 3. D) NONE OF THESE. Show Answer Correct Answer: A) 1. 8. The property of a body to resist any change in its state of motion is known as: A) Force. B) Inertia. C) Momentum. D) Acceleration. Show Answer Correct Answer: B) Inertia. 9. Inertia depends on ..... A) Weight. B) None of these. C) Mass. D) Acceleration. Show Answer Correct Answer: C) Mass. 10. A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of mass 20 g is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man? A) (a) 1 m/s. B) (b) 0.1 m/s. C) C) 0.01 m/s. D) (d) 0 m/s. Show Answer Correct Answer: B) (b) 0.1 m/s. 11. MOMENTUM FORMULA A) P=mv. B) M=vm. C) V-PM. D) All of these. Show Answer Correct Answer: A) P=mv. 12. Which law explains how rockets are launched into space? A) Newton's First Law of Motion. B) Newton's Second Law of Motion. C) Newton's Third Law of Motion. D) Newton's Fourth Law of Motion. Show Answer Correct Answer: C) Newton's Third Law of Motion. 13. According to second law of motion "the rate of change of momentum is directly proportional to ..... applied" . A) MASS. B) VELOCITY. C) FORCE. D) NONE OF THESE. Show Answer Correct Answer: C) FORCE. 14. Which of the following phenomenon is NOT an example of Law of Inertia? A) When you shake a branch the leaves get detached. B) Wearing the seat belt while driving a car to avoid injuries. C) Local trains and metro coaches have hanging straps for the standing passengers to grab. D) Rocket's burning flame which pushes into space. Show Answer Correct Answer: D) Rocket's burning flame which pushes into space. 15. If a net force of 5 N was constantly applied on 200 g object at rest, how long will it take to raise its velocity to 150 m/s? A) 2 sec. B) 6 sec. C) 4 sec. D) 8 sec. Show Answer Correct Answer: B) 6 sec. 16. In which direction and with how much force will an object move if you push to the left with 15N of force and your friend pushes to the right with 5N of force? A) Up with 10N of force. B) Left with 10N of force. C) Down with 5N of force. D) Right with 10N of force. Show Answer Correct Answer: B) Left with 10N of force. 17. Stacy is rowing a boat. She wants the boat to move forward. According to Newton's Third Law, in which direction should she move her paddle in the water? A) Backwards. B) Above her head. C) Forward. D) East. Show Answer Correct Answer: A) Backwards. 18. When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s$^{2}$. If one of the astronauts had a mass of 60.0 kg, what net force in newtons did the astronaut experience? A) 1740 m/s$^{2}$. B) 1740 N. C) 2.07 N. D) .48 N. Show Answer Correct Answer: B) 1740 N. 19. The sum (total) of all forces acting on an object: A) Unbalanced Force. B) Balanced Force. C) Newtons. D) Net Force. Show Answer Correct Answer: D) Net Force. 20. Friction is a force that always acts A) Perpendicular to an object's motion. B) Opposite to an object's motion. C) In the same direction as an object's motion. D) Parallel to the object's motion. Show Answer Correct Answer: B) Opposite to an object's motion. 21. The gravity between two objects depends on the distance and ..... A) Magnetic attraction. B) Volume. C) Mass. D) Momentum. Show Answer Correct Answer: C) Mass. 22. An object at rest will ..... if no outside forces are applied. A) Stay at rest. B) Increase velocity. C) Decrease mass. D) Fall to the ground. Show Answer Correct Answer: A) Stay at rest. 23. MASS OF THE OBJECT IS DOUBLED THEN FORCE OF THE OBJECT IS ..... A) DOUBLED. B) BECOMES HALF. C) QUARTER. D) NONE OF THESE. Show Answer Correct Answer: A) DOUBLED. 24. THERE ARE 3 SOLID BALLS MADE UP OF ALUMINUM, STEEL AND WOOD OF SAME SHAPE AND VOLUME. WHICH OF THEM HAVE HIGHEST INERTIA? A) WOOD. B) STEEL. C) ALUMINIUM. D) ALL OF THESE. Show Answer Correct Answer: B) STEEL. 25. THE MASSES OF TWO BODIES ARE IN RATIO 5:6 AND THEIR VELOCITIES ARE IN RATIO 1:2. THEN THEIR LINEAR MOMENTUM WILL BE IN THE RATIO A) 5:6. B) 1:2. C) 12:5. D) 5:12. Show Answer Correct Answer: D) 5:12. ← PreviousNext →Related QuizzesClass 9 Science Chapter 9 Force And Laws Of Motion Quiz 1Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 2Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 3Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 4Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 5Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 7Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 8Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 9Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 10Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books