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Physics Forces

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1. Q: What is the push or pull on an object that can cause it to accelerate called?B: force-------------------------------------2. Q: What is the unit of measure for force?C: Newton-------------------------------------3. Q: What is the sum of all forces acting on an object called?D: net force-------------------------------------4. Q: In a tug of war, when one team is pulling with a force of 100 N and the other 80 N, what is the net force?A: 20 N-------------------------------------5. Q: Newton's First Law of Motion is also called:D: Law of Inertia-------------------------------------6. Q: Newton's first Law of Motion states that if there is no net force acting on an object it will:D: all of the above-------------------------------------7. Q: What does Newton's Second Law of Motion state?C: F = ma-------------------------------------8. Q: In the equation F = ma, what does m represent?A: Mass-------------------------------------9. Q: How much net force is required to accelerate a 2000 kg car at 3.00 m/s2?C: 6000 N-------------------------------------10. Q: If you apply a net force of 3 N on 100 g-box, what is the acceleration of the box?D: 30 m/s2-------------------------------------11. Q: Which is true from Newton's Third law of motion?B: For every action force there is an equivalent reaction force in the opposite direction.-------------------------------------12. Q: What is the net force on 200 g ball when it hits a wall with acceleration of 10 m/s2?B: 2 N-------------------------------------13. Q: Are mass and weight the same?B: No-------------------------------------14. Q: What will be different on the moon than on the earth?B: weight-------------------------------------15. Q: What do you multiply mass by to get the weight?A: gravity-------------------------------------16. Q: If you mass is 40 kg, what is your weight on the Earth?C: 392-------------------------------------17. Q: If the gravity of the Moon is 1/6 of g (which is 9.8 m/s2), what is the mass of an object that has a weight of 115 N on the Moon?B: 70.4-------------------------------------18. Q: The normal force acts on any object that:D: Touches a surface-------------------------------------19. Q: What is the normal force acting on a 50 kg dog?B: 490 N-------------------------------------20. Q: What is the force that acts between two object in contact because of action-reaction?B: Friction Force-------------------------------------21. Q: In the equation F(f) = uF(n), where F(f) is the Force of Friction and F(n) is the Normal ForceA: coefficient of friction-------------------------------------22. Q: If you throw a 150 g book on a floor where u = 0.2, what is the force of friction?B: .29 N-------------------------------------23. Q: How big is the net force acting on an object with constant velocity?A: 0 N-------------------------------------24. Q: If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?D: 4.57 s-------------------------------------25. Q: If you push with a 5N force on a 1 kg box that is resting on a floor where u = 0.3, will the box move?A: Yes-------------------------------------Click here for the Physics Forces questions

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