Independent Review Forces and Motion. Which of Newtons Laws does the following best describe? 1. A...

Independent ReviewIndependent ReviewForces and MotionForces and Motion

Which of Newton’s Laws does the Which of Newton’s Laws does the following best describe?following best describe?

1. A golfer swings the clubs and hits 1. A golfer swings the clubs and hits the golf ball to the green.the golf ball to the green.

2nd Law!!!

Which of Newton’s Laws does the Which of Newton’s Laws does the following best describe?following best describe?

2. The Earth revolves around the sun 2. The Earth revolves around the sun about every 365 days.about every 365 days.

1st Law!!!

Which of Newton’s Laws does the Which of Newton’s Laws does the following best describe?following best describe?

3. A boat pulls a skier across a lake.3. A boat pulls a skier across a lake.

2nd Law!!!

Which of Newton’s Laws does the Which of Newton’s Laws does the following best describe?following best describe?

4. A plate stays on the table as the 4. A plate stays on the table as the table cloth is ripped off.table cloth is ripped off.

1st Law!!!

Which of Newton’s Laws does the Which of Newton’s Laws does the following best describe?following best describe?

5. A person walks up the stairs.5. A person walks up the stairs.

3rd Law!!!

6 N4 N

9 N

6. What is the net force and direction of movement?

1 Newton to the right

6 N2 N

7. Balanced or Unbalanced???

8 N

8. The figure below shows two equal 8. The figure below shows two equal forces acting on a box. The box is forces acting on a box. The box is

seen from above. In which direction seen from above. In which direction will the box move?will the box move?

Southwest

9. Which graph to the 9. Which graph to the right shows an object right shows an object that is NOT MOVING?that is NOT MOVING?

Graph CGraph C

10. Which graph to the 10. Which graph to the right shows an object that right shows an object that

is moving at a is moving at a CONSTANT SPEED?CONSTANT SPEED?

Graph BGraph B

11. Which of the 11. Which of the graphs to the right graphs to the right

shows an object that shows an object that is SPEEDING UP?is SPEEDING UP?

Graph BGraph B

12. Which of the 12. Which of the graphs to the right graphs to the right

shows an object that is shows an object that is moving at a moving at a

CONSTANT SPEED?CONSTANT SPEED?

Graph DGraph D

13. Which of the 13. Which of the graphs to the right graphs to the right

shows an object that is shows an object that is SLOWING DOWN?SLOWING DOWN?

Graph CGraph C

14. Which of the 14. Which of the graphs to the right graphs to the right

shows an object that is shows an object that is SPEEDING UP and SPEEDING UP and SLOWING DOWN SLOWING DOWN

back and forth?back and forth?

Graph AGraph A

15. Name ALL the 15. Name ALL the graphs to the right graphs to the right

shows an object that shows an object that is accelerating?is accelerating?

Graphs A, B, Graphs A, B, and C.and C.

16. The graph to 16. The graph to the right shows the the right shows the

motion of a cat motion of a cat over time. What over time. What

was the cats was the cats average speed?average speed?

0.8 m/s0.8 m/s

17. The graph to 17. The graph to the right shows the the right shows the

motion of a cat motion of a cat over time. During over time. During

which interval does which interval does it show the cat was it show the cat was

moving the moving the FASTEST?FASTEST? A)A) Between 0 and 40 seconds.Between 0 and 40 seconds.

B)B) Between 40 and 60 seconds.Between 40 and 60 seconds.C)C) Between 60 and 100 Between 60 and 100

seconds.seconds.

18. The graph to 18. The graph to the right shows the the right shows the

motion of a cat motion of a cat over time. During over time. During

which interval does which interval does it show the cat was it show the cat was

STATIONARY?STATIONARY?A)A) Between 0 and 40 seconds.Between 0 and 40 seconds.B)B) Between 40 and 60 seconds.Between 40 and 60 seconds.C)C) Between 60 and 100 Between 60 and 100

seconds.seconds.

19. The graph to 19. The graph to the right shows the the right shows the

motion of a cat motion of a cat over time. During over time. During

which interval does which interval does it show the cat was it show the cat was

moving the moving the SLOWEST?SLOWEST? A)A) Between 0 and 40 seconds.Between 0 and 40 seconds.

B)B) Between 40 and 60 seconds.Between 40 and 60 seconds.C)C) Between 60 and 100 Between 60 and 100

seconds.seconds.

20. The graph to 20. The graph to the right shows the the right shows the

motion of a cat motion of a cat over time. What is over time. What is the cat’s average the cat’s average speed for the first speed for the first 40 seconds of the 40 seconds of the

trip?trip?0.5 m/s0.5 m/s

21. What is the acceleration of 21. What is the acceleration of the above box?the above box?

4.5 m/s4.5 m/s22

10 kilograms

45 Newtons of force

22. A 12x12 moving box was 22. A 12x12 moving box was loaded into a moving truck. If it loaded into a moving truck. If it took 800 joules to get the box 5 took 800 joules to get the box 5 meters to the truck, how much meters to the truck, how much force was applied to the box?force was applied to the box?

F = 160 NewtonsF = 160 Newtons

23. A 12 kg ball was kicked and 23. A 12 kg ball was kicked and hit another student. The ball hit another student. The ball accelerated at 4 m/saccelerated at 4 m/s22. How . How

much force did the student take much force did the student take on impact? on impact?

F = 48 NewtonsF = 48 Newtons

24. A student lifted a book 24. A student lifted a book weighing 120 Newtons off weighing 120 Newtons off

the ground 1.5 meters. How the ground 1.5 meters. How much work did the student much work did the student

do?do?

W = 180 joulesW = 180 joules

25. A roller coaster is pulled up 25. A roller coaster is pulled up the first hill with a force of 225 N. the first hill with a force of 225 N. It uses 18,000 joules of energy It uses 18,000 joules of energy to get the roller coaster up the to get the roller coaster up the

hill. How tall must the first hill of hill. How tall must the first hill of the roller coaster be?the roller coaster be?

d = 80 metersd = 80 meters

26. Tommy hit a golf ball with a 26. Tommy hit a golf ball with a force of 1125 Newtons and it force of 1125 Newtons and it

gave the ball an acceleration of gave the ball an acceleration of 45 m/s45 m/s22. What is the mass of the . What is the mass of the

golf ball?golf ball?

m = 25 gramsm = 25 grams

The End!!!The End!!!

Please return the power point to Please return the power point to the first slide!!!the first slide!!!