Power Problems
Calculate how much power is used if 30 J of work is done in 5 seconds
What does 30 J mean?
- W (work)
- P (power)
- d (distance
- F (force)
- S (speed)
- KE (kinetic energy)
- p (momentum)
- E (energy)
- t (time)
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
What does 5 seconds mean?
- W (work)
- P (power)
- d (distance
- F (force)
- S (speed)
- KE (kinetic energy)
- p (momentum)
- E (energy)
- t (time)
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
t = 5 sec
What is the equation for power?
- P = W/t
- D = m/v
- S = D/t
- p = mv
- KE = (1/2)mv2
- F = ma
- V = IR
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
t = 5 sec
Equation: P = W/t
Which of the following is correct?
- P = W ÷ t
- P = W x t
- P = W + t
- P = W - t
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
t = 5 sec
Equation: P = W/t
Which of the following is correct?
- P = 30J/ 5 sec
- P = 5 s/ 30 J
- P = 30 J x 5 s
- P = 30J + 5 s
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
t = 5 sec
Equation: P = W/t
P = 30J/ 5 s
So, P = ___ (no units, yet)
- 6
- 35
- 25
- 150
Calculate how much power is used if 30 J of work is done in 5 seconds
W = 30 J
t = 5 sec
Equation: P = W/t
P = 30J/ 5 s
So, P = 6 __
Which of the following is correct?
- 6 watts
- 6 joules
- 6 newtons
- 6 meters
- 6 sec
- 6 m/s