STUDY GUIDE FOR 15 WEEK-motion-speed, velocity, acceleration, newton’s laws of motion, momentumFind the direction of the net force:Name: ________________________ Class Period: ____ Date: ___________

Fill in the missing values to balance the object:

Which direction will the box move and what is the net force?

REFER TO www.physic sclassroom.com - tutorials—1D kinematics, Newton;s laws of motion/ TEXT BOOK- Chapter 2 and Chapter 3

1.The upward force on an object falling through the air is ____.a. air resistance c. momentumb. inertia d. terminal velocity

____ 2. A feather will fall through the air more slowly than a brick because of ____.a. air resistance c. inertiab. gravity d. momentum

____ 3. In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.a. fall at different rates c. floatb. fall at the same rate d. not have momentum

____ 4. The acceleration due to gravity is ____.a. 98 m/s2 c. 9.8 m/sb. 9.8 m/s2 d. 0.98 m/s

____ 5. The size of the gravitational force between two objects depends on their ____.a. frictional forcesb. inertiac. masses and the distance between themd. speed and direction

____ 6. As you get farther from the center of Earth, your weight will ____.a. decrease c. remain the sameb. increase d. can't tell from information given

____ 7. When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called ____ forces.a. action-reaction c. frictionalb. centripetal d. gravitational

____ 8. A 300-N force acts on a 25-kg object. The acceleration of the object is ____.a. 7,500 m/s2 c. 25 m/s2

b. 300 m/s2 d. 12 m/s2

____ 9. A 3,000-N force acts on a 200-kg object. The acceleration of the object is ____.a. 50 m/s2 c. 15 m/s2

b. 26 m/s2 d. 150 m/s2

____ 10. An object that is in free fall seems to be ____.a. not moving c. speeded up by air resistanceb. slowed by air resistance d. Weightless

____ 11. Inertia varies depending on ____.a. force c. velocityb. mass d. motion

____ 12. Newton's first law of motion is also called the law of ____.a. mass c. forceb. inertia d. constant velocity

____ 13. The relationship among mass, force, and acceleration is explained by ____.a. conservation of momentum c. Newton's second law of motionb. Newton's first law of motion d. Newton's third law of motion

____ 14. For any object, the greater the force that's applied to it, the greater its ____ will be.a. acceleration c. inertiab. gravity d. velocity

____ 15. A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.a. generates less friction c. has less massb. has greater mass d. has greater forward motion

____ 16. In the equation p = m v, the p represents ____.a. friction c. momentumb. inertia d. position

____ 17. The statement "to every action there is an equal and opposite reaction" is ____.a. the law of conservation of momentumb. Newton's first law of motionc. Newton's second law of motiond. Newton's Third law of motion

____ 18. The unit of momentum is ____.a. kg m c. kg m/s2

b. kg m/s d. m/s2

____ 19. When two balls collide, the momentum of the balls after the collision is explained by ____.a. the law of conservation of momentumb. Newton's first law of motionc. Newton's second law of motiond. Newton's third law of motion

Figure 3-1

____ 20. A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?a. direction a c. direction c

b. direction b d. direction d

21. A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. In which direction will the acceleration on the ball be when the ball passes point A?a. direction a c. direction cb. direction b d. direction d

____ 22. Newton’s law of universal gravitation states thata. the orbits of the planets are elliptical.b. the speed of a planet’s orbit varies depending on which part of the ellipse it is

occupying.c. the square of the ratio of the periods of any two planets revolving around the Sun

is equal to the cube of the ratio of their average distance from the Sun.d. objects attract other objects with a force that is directly proportional to the product

of their masses, and inversely proportional to the square of the distance between them.

____ 23. Gravity is what type of force?a. field force c. normal forceb. contact force d. frictional force

____ 24. The rate at which an object’s velocity changes is called its _____.a. acceleration c. displacementb. average velocity d. scalar magnitude

ANSWER THEM IN YOUR NOTE BOOK IN COMPLETE SENTENCE/or PRINT THIS, ANSWER THEM and place it in your class binder.

1. The relationship among mass, force, and acceleration is explained by which of Newton’s Laws?

2. The statement "to every action there is an equal and opposite reaction" is which of Newton’s Laws?

3. When two balls collide, the momentum of the balls after the collision is explained by which Newton’s Law?

4. A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?

5. What force is needed in order to prevent the object below from moving?

9. In the equation p = m*v, the p represents ____.

10. The unit of momentum is ____.

6. What would the resultant force be of the system above?

7. The four forces acting on a plane are shown here. The plane is in level flight. This means that thrust must be equal to _________.

8. According to the picture below, if the balloon is released upward what is the equal and opposite motion according to Newton’s 3rd

law?

17. What is the name of the force that moves in opposition to motion; which slows or stops motion?

18. For any object, the greater the force that's applied to it, the greater its ____ will be.

A. acceleration

11. Momentum is dependent upon an object’s _____

12. Given a mass of 120 kg and a velocity of 2 m/s what would the momentum be?

13. Given a momentum of 600 kg-m/s and a velocity of 50 m/s what would the mass be?

14. A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.

A. generates less frictionB. has greater massC. has less massD. has greater forward motion

15. A 255 kg car moving at 20 m/s hits a 175 kg car at what velocity in a collision (assuming the momentum from the first car is transferred to the second car)?

16. When an object moves in a circular path, it accelerates toward the center of the circle as a result of which type of force?

24. What is the name of a force that is exerted through a string, rope or cable when pulled tightly from opposite ends?

25. An object with a mass of 45 kg has a weight of:

26. A car with weight of 6370 Newton has what mass?

27. An pair of headphones has a mass of 0.25 kg on earth. If it’s weight on earth is 2.5 Newton, what would the weight be on the moon where the gravity is 1/6th of that on earth?

28. As you get farther from the center of Earth, what will happen to your weight?

29. A feather will fall through the air more slowly than a brick because of ____.

B. gravityC. inertiaD. velocity

19. A force (F1) is used to pull a 20 N box across a carpeted floor. What is typically true about the force, F2, used to pull the same box across the ice at an ice rink?

A. F1 is greater than F2B. F2 is greater than F1C. F1 and F2 are both equal to 20

N.D. F1 and F2 are equal, but are

more than 20 N.

20. Gravity is a force that ______________.

A. Exists on earth only.B. Is the same on every planet.C. Is created by objects in

motion.D. Exists between all objects that

have mass.

21. The constant for acceleration due to gravity is:

22. An object on earth will have ________ mass as on the moon.

23. An object on earth will have_______ weight than on the moon.

____________________________The rela 31. The relationship among speed,

distance, and time is ____.a. t = s/d c. s = dtb. d = t/s d. s = d/t

23. 32.A single point on a distance-time graph tells the ____.a. instantaneous

speedc. constant speed

b. average speed d. average velocity

24. 33. A merry-go-round horse moves at a constant speed but at a changing ____.a. velocity c. inertiab. balanced force d. unbalanced force

30. In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.

25. 34.Acceleration is rate of change of ____.a. position c. velocityb. time d. force

EXTENDED ESSAY QUESTION 57.Explain how mass and weight different from each other. (Give 4 differences-in terms of

their definitions, formulas, examples, SI Units)

58. Why is your weight less on the Moon than on Earth, but your mass is the same?

(ANSWER TO THE FIRST TWO PAGES)Name: ________________________ Class Period: ____ Date: ___________

Left 5N Up 5N

**To find net force, you subtract opposing sides and add same sides**

Fill in the missing values to balance the object:

Which direction will the box move and what is the net force?

No where 12N

8N 12N

Up 8N Left 4N