how much power is used when a weightlifter lifts a 1250-n barbell 2 meters in 3 seconds. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Force x Distance/Time = 833 Watts
thank you very much!
To calculate the power used by the weightlifter, you need to use the formula:
Power (P) = Work (W) / Time (t)
Step 1: Calculate the work done by the weightlifter.
Work (W) can be calculated using the formula:
Work (W) = Force (F) * Distance (d) * cos(theta)
In this case, the weightlifter lifted the barbell vertically, so the angle (theta) between the force and distance is 0 degrees, and cos(0) = 1.
Work (W) = Force (F) * Distance (d) * cos(theta)
Work (W) = 1250 N * 2 m * cos(0)
Work (W) = 1250 N * 2 m * 1
Work (W) = 2500 Nm (or Joules)
Step 2: Calculate the power used.
Power (P) is calculated by dividing the work done by the time taken.
Power (P) = Work (W) / Time (t)
Power (P) = 2500 Nm / 3 s
Power (P) ā 833.33 Watts (or Joules per second)
Therefore, the power used by the weightlifter when lifting the 1250-N barbell 2 meters in 3 seconds is approximately 833.33 Watts.
To determine the power used by a weightlifter, we can use the formula:
Power = Work / Time
First, let's calculate the work done by the weightlifter. Work is defined as the product of force and displacement.
Work = Force * Displacement
In this case, the force is the weight of the barbell, which is given as 1250 N, and the displacement is 2 meters.
Work = 1250 N * 2 m = 2500 Nā
m or 2500 Joules (J)
Next, we need to calculate the power used, using the given time of 3 seconds.
Power = Work / Time
Power = 2500 J / 3 s ā 833.33 Watts (W)
So, the weightlifter uses approximately 833.33 Watts of power when lifting the 1250 N barbell 2 meters in 3 seconds.