1. The Physics Formula review game.
What formula is it ??????
The Physics Formula review game.

2. Question 1
A boat was moving at 10m/s and accelerated at 2m/s/s for 10 seconds. Which of the following is its final speed?

3. Answer 1
A = Vf – Vi / t
acceleration

4. Question 2
A soccer player kicks a 0.1kg ball that is initially at rest so that it moves with a velocity of 20 m/s. What is the impulse the player imparts to the ball? If the players foot was in contact with the ball for 0.01s, what was the force exerted by the player’s foot on the ball?

5. Answer 2
Impulse
J = Ft = mv

6. Question 3
A ball has a momentum of 15 kg.m/s. It strikes a motionless ball and stops. If the second ball has a mass of 5kg, what is the magnitude of its velocity after the collision?

7. Answer 3
Momentum
P = m x v

8. Question 4
A force of 500 N is exerted on a baseball by the bat for 0.001s. What is the change in momentum of the baseball?

9. Answer 4
Impulse
J = Ft = mv

10. Question 5
The specific heat of copper is J/g C. How much thermal energy is required to increase the temperature of a 20g sample of copper from 20 – 50 C.

11. Answer 5
Heat Gained or Lost
Q = mcpT

12. Question 6
Two opposite charges of magnitude 3.0 x 10^-4 Coulomb and 4.0 x 10^-4 coulomb attract each other with a force of 3.6 x 10 N.
What distance in meters is between the two charges?

13. Answer 6
Force between 2 charged particles
Fe = Kc ( q1q2/d^2)

14. Question 7
Calculate the total resistance of the circuit below.

15. Answer 7 Equivalent resistance for resistors in parallel
1/R = 1/R1 + 1/R /R3

16. Question 8
What is the power supplied by the 5.0 Volt battery in 3 seconds if the circuit has a current of 25amps?

17. Answer 8
Electrical Power
P = V x I

18. Question 9
The speed of sound in water at a temperature of 25 C is 1500 m/s. What is the wavelength of a 300 Hz sound wave traveling through water at a temperature of 25 C?

19. Answer 9
Velocity of a Wave
Frequency x wavelength

20. Question 10
A pitcher throws a fast ball horizontally toward home plate meters away. If the ball is traveling at a speed of 40.0 m /s, neglecting air friction, how long does it take the ball to get to home plate?

21. Answer 10
Velocity
Distance / Time

22. Question 11
A motor gives a 5 kg load a horizontal acceleration of 4 meters per second squared. What is the magnitude of the force applied by the motor?

23. Answer 11
Net Force
Mass x Acceleration

24. Question 12
Which of the following is the minimum amount of work done by a hydraulic lift to raise a 150 kg aluminum block 2.0 m vertically?

25. Answer 12
Work
Force x Distance

26. Question 13
A 125 kg skier began moving down a slope at 5 m/s and was going 10 m/s by the time he reached the bottom. How much work was performed here?

27. Answer 13
Work
W = Change in KE

28. Question 14
A ball is thrown straight down at a speed of 5.0 m/s and accelerates under the pull of gravity for 2.o seconds. How fast is it moving?

29. Answer 14
Acceleration
A = Vf – Vi / t

30. Question 15
The masses for Earth and the Moon are listed below along with the average distance between their centers.
Earth’s mass = 5.98 x 1024 kg
Moon’s Mass = 7.36 x 1022 kg
Distance = 3.84 x 108
What is the attraction due to gravity of Moon on the Earth?

31. Answer 15 Force of gravitational attraction between 2 objects
Fg= G ( m1m2)/ d2

32. Question 16
A force of 1000N is exerted on a golf ball for 0.005s. The change in momentum of the golf ball is?...

33. Answer 16
Impulse
J = Ft = mv

34. Question 17
A 2.5 kg book slides horizontally and falls from a shelf 3.0 m above the floor. How much work does the force of gravity do on the book as it falls 3.0m?
2 steps ( list both to get question correct)

35. Answer 17
1. Mass x Gravity = Force
2. Work = Force x Distance

36. Question 18
A spring does 5.0 J of work on a 0.10Kg ball bearing in a pinball machine. The ball’s resulting speed just after leaving the spring is ?

37. Answer 18
Work
W = change in KE
½ m ( V22 – V12)

38. Question 19
The current supplied by the battery for the diagram is 0.17 amps. What is the potential difference across the 20.0 ohm resistor?

39. Answer 19
Current
I = V/R

40. Question 20
If you have a Wave with a period of .007 S and a wavelength of 2 m , what is the wave speed?
( 2 Steps, must write both to get question correct)

41. Answer 20 1. Find Frequency 1/period
2. Wave speed = frequency x wavelength

42. Question 21
If you have an object that is 5 m from a magnifying lens that portrays an image that is 10 m away from the lens. What is the focal length of this lens?

43. Answer 21
1/ focal length =
1/distance to image + 1/ distance to object

44. Question 22
A 600 N person runs up a set of stairs that is 2.5 meters high in 2 seconds. How much power is generated?
(2 steps, include both to get question correct)

45. Answer 22
1. work = force x distance
2. power = work /time

46. Question 23
A car traveled 240km in 3 hours. What was its average speed in km per hours?

47. Answer 23
Velocity = d/t

48. Question 24 The speed of a car is decreasing uniformly from
35 m/s to 15 m/s in 4 seconds. What is the magnitude of the car’s acceleration?

49. Answer 24
Acceleration
A = Vf – Vi / t

50. Question 25 A 1000 kg car traveling east at
20 m/s collides head-on with a 1200 kg car traveling west at 15m/s. Assuming the cars stick together after impact, what is their momentum after the collision?

51. Answer 25
Law of Conservation of Momentum
M1V1 + M2V2 = M1V1 + M2V2