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Zarrin [17]
3 years ago
7

You and friend run up a fight of stairs that is 30 m high. Both of you reach the top in 12 seconds. Your weight is 570 N and you

r friend weights 620 N. Which of you has more power? Show all work
Physics
1 answer:
iren [92.7K]3 years ago
4 0
P = F*d / t
P1 = 570N * 30m / 12s = 1425W
P2 = 620N * 30m /12s = 1550W
Your friend has more power

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On the moon, the acceleration of gravity is 1.6 m/s2. If an object has a
Amanda [17]

Answer:

5.1 kg

Explanation:

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4 0
3 years ago
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceler
ANEK [815]

Answer:

a) t_r = 0.55 s

b) a = 5.59 m/s²

Explanation:

given,

total distance traveled by the car to stop is 56.9 m when speed of vehicle is 80 km/h or 80 × 0.278 = 22.24 m/s

total distance traveled by the car to stop is 25.7 m when speed of vehicle is 50.7 km/h or 50.7 × 0.278 = 14.09 m/s

using stopping distance formula

s_1 = v_1 t_r +\dfrac{v_1^2}{2 a}................(1)

s_2 = v_2 t_r +\dfrac{v_2^2}{2 a}..............(2)

on solving both the equation we get

a = \dfarc{v_1v_2(v_1-v_2)}{2(s_1v_2-s_2v_1)}

a = \dfarc{22.4\times 14.09(22.24-14.09)}{2(56.9\times 14.09-25.7\times 22.24)}

a = 5.59 m/s²

now reaction time calculation

t_r =\dfrac{v_1^2d_2-v_2^2d_1}{v_1v_2(v_1-v_2)}

t_r =\dfrac{22.24^2\times 25.7-14.09^2\times 56.9}{22.4\times 14.09(22.24-14.09)}

t_r = 0.55 s      

8 0
3 years ago
The solar system involves the revolution of two planets around it.true/false.​
zhuklara [117]

Answer:

false

Explanation:

all planets revolve around the solar system

hope this is clear enough answered

3 0
3 years ago
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