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Grade: 12

                        

A bicycle travels up a hill at an average speed of 4m/s and down the same hill through the same distance at an average speed of 8m/s. Express the average speed for the entire journey in terms oftandd.

6 years ago

Answers : (1)

raj
8 Points
							There is nothing difficult in this question. It gives you a lucid description of the situation and the values are given conspicuously. All you need to do is to understand thatF x s= work done, that is, represented by the letterEin the formula: P = E/t. The rest of the solution is given below:
P = E/t
= (F x s)/ t
= F x (s/t)
= F x speed
= 15N x 0.5 m/min
= 0.125W
						
6 years ago
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