1. Newton’s Laws Balanced/Unbalanced Forces Speed

2. What is a force?
A push or a pull

3. When 2 forces are acting in opposing directions, as shown below, how do you calculate their net force?
Subtract

4. Name 3 examples of how living things use gravity to help them survive

5. What is a balanced force?
Force on an object that DOES NOT cause a change in motion

6. When 2 forces are acting in the same direction, as shown below, how would you calculate their net force?
Add

7. What is inertia?
The tendency of an object to remain still or continue moving unless force is applied

8. 11. A) Calculate the net force of the following scenario:
75N – 50N =
25N to the left

9. What is an unbalanced force?
Forces on an object that cause a change in motion

10. Draw a diagram that explains what happens to a balloon when air is released

11. What is the formula for calculating speed?
Speed = distance
time

12. Remain at rest unless an unbalanced force acts on it
An object at rest will…..
Remain at rest unless an unbalanced force acts on it

13. 11. B) Calculate the net force of the following:
30N + 25N = 55N to the right

14. If a car traveled 17 mi in 25min, then what is it’s speed?
S= d = 17mi = 0.68 mi/min
t 25min

15. What is Newton’s second law written as a formula?
F=ma
Force = mass*acceleration

16. 11. C) Calculate the net force of the following scenario:
70N – 45N = 25N to the right

17. If a ball is sitting in a wagon and the wagon moves forward or backwards describe what happens.
The ball will sit still in the middle unless an unbalanced force acts on it

18. Use the graph below to calculate the average speed of the runner.
120 D I S T AN C E
100 80 60 40 20 2 4 6 8 10 12
Time (s)
S= d = 20 = 10m/s t

19. Victor kicked a 5kg soccer ball with a force of 4N, and Jose kicked a 2kg soccer ball with a force of 8N. Whose ball had the greater acceleration?
Jose’s….he kicked with an acceleration of 4 and Victor kicked with an acceleration of 0.8

20. According to the data listed below, which ball would have the least force?
Object
Mass
Acceleration
Soccer ball
40g
5 m/s
Tennis ball 5g
100 m/s
Marble 1g
1000 m/s
Soccer ball

21. What scientific equipment would you need to measure speed?
Stopwatch, meter stick, calculator

22. Cart A will accelerate quicker b/c it has less mass
In the picture below, explain how F=MA would be used in the situation that follows. The carts are held together by a string and the spring between them is compressed. Ms. Simmons comes along and cuts the string. What is going to happen to the carts?
Cart A will accelerate quicker b/c it has less mass

23. List the lines in order from fastest to slowest
Blue, Red, Green

24. Calculate the net force of the following:
37N to the right

25. What do we need to do to Channing to get him to accelerate?
Apply an unbalanced force

26. Skyler threw the football 17 yards in 37 seconds
Skyler threw the football 17 yards in 37 seconds. At what speed was the football traveling?
0.46 yd/sec.

27. Brandon used a triple beam balance and determined that the mass of the rock shown was 274g. Use the image below to determine the volume?
D=27.4 g/mL

28. Chemical  Electrical  Sound
What energy transformations take place when a battery-operated radio is in use?
Chemical  Electrical  Sound