Answer: a) 18670 W b) 25 hp
Explanation:
a)
Average power,
P = W/t
W= 0.5 MVf^2 - 0.5 MVo^2
Therefore P =( (0.5 x 112 x 34.5^2 ) - (0.5 x 112 x 0 ) ) / 3.57
P = 1.87 x 10^4 W
b)
Power in units of horsepower is
P = 1.87 x 10^4 / 745.7 = 25hp
Answer:
a)52.58 m/s
b)56.13°
Explanation:
assume the upward direction as positive
x-component of the velocity = 29.3×cos33.6°=24.40 m/s (remain constant)
y-component of the velocity which is -29.3sin33.6°= -16.21 m/s
time of flight = 68.3/24.40= 2.7991 seconds
now, we can obtain final velocity in y-direction
=43.66 m/s
=52.58 m/s
for direction
56.13° from the horizontal
Kinetic energy = (1/2) (mass) (speed)²
The rock's kinetic energy is not
(1/2) (4 kg) (10 m/s)²
= (1/2) (4 kg) (100 m²/s²)
= 200 Joules .
It may be more, or it may be less. The only thing
we can be sure of is that it is not 200 Joules.
Yes light travels at 3.00
Answer:
Correct answer: F = 5.075 N
Explanation:
The formula for Newton's Second Law is
F = m · a = 0.145 · 35 = 5.075 N
God is with you!!!