Question

How much power is used if an athlete lifts a 50N weight up 2 meters in 10 seconds?

Answer 1

The athlete uses 10 Watts of power to lift a 50N weight up 2 meters in 10 seconds, calculated by dividing the work done (100 Joules) by the time taken (10 seconds).

Step-by-step explanation:

To calculate the power used by the athlete, we need to use the definition of power in physics, which is the rate at which work is done or energy is transferred. Power (P) can be calculated using the formula P = Work/time. The work done to lift the weight can be found through the formula Work = Force × Distance. Here, the Force (F) is 50 N and the Distance (d) is 2 meters.

So, the work W is calculated as:

• W = F × d = 50 N × 2 m = 100 Joules.

Now we can calculate the power:

• P = W / time = 100 J / 10 s = 10 Watts.

Thus, the athlete uses 10 Watts of power to lift a 50N weight up 2 meters in 10 seconds.

Answer 2

the power used by the person is 10 W.

Step-by-step explanation:

Given;

weight lifted, W = 50 N

distance through which the weight was lifted, d = 2 m

time of motion, t = 10 s

The power used by the person is calculated as;

`P= FV\\\\P = F \ * \ (d)/(t) \\\\P = 50 \ * \ (2)/(10) \\\\P = 10 \ W`

Therefore, the power used by the person is 10 W.