a 49 newton rockis lifted 2meters in 5 seconds
How much work is done?
b what power is used?
work= force*distnace= 49*2
power= work/time
19.6
98J
To find the amount of work done, you can use the formula:
Work = Force × Distance
Given that the force exerted is 49 Newtons and the distance lifted is 2 meters, we can substitute these values into the formula:
Work = 49 N × 2 m = 98 Joules
Therefore, the amount of work done is 98 Joules.
For the power used, you can use the formula:
Power = Work / Time
To calculate the power, we need to know the time taken. From the given information, we know that the time taken is 5 seconds.
Using the value of work obtained in the previous calculation (98 Joules) and time value (5 seconds), we can substitute these values into the formula:
Power = 98 J / 5 s = 19.6 Watts
Therefore, the power used is 19.6 Watts.