A ship travels north at 15 km/h for 5 h. What is the ship's displacement in km?
2 answers:
Answer:
Displacement, d = 75 km
Explanation:
Given that :
The speed of the ship is 15 km/h. It travels for 5 h.
To find :
The displacement of the ship
Solve :
Let d is the displacement of the ship. It can be calculated using the definition of velocity. The total displacement per unit time is called the velocity of an object.
On rearranging,
d = 75 km
Therefore, the ship's displacement is 75 km.
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The height above the ground from where the skier start is 11.5 m.
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P.E = K.E
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gh = ¹/₂v²
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Answer:
5.62 m/s
Explanation:
Newton's law of motion can be used to determine the maximum speed of the elevator. In the question, we are given:
Force exerted by the elevator (R) = 1.7 times the weight of the passenger (m*g)
Thus: R = 1.7*m*g
Distance (s) = 2.3 m
Newton's second law of motion: R - m*g = m*a
1.7*m*g - m*g = m*a
a = 0.7*m*g/m = 0.7*g = 0.7*9.8 = 6.86 m/s²
To determine the maximum speed:
Therefore, the elevator maximum speed is equivalent to 5.62 m/s.