Power is defined as work over time. Thus, we must first calculate the work involved in moving the barbell. W = Fd = 150 lbs * 2 ft = 300 ft-lbs per rep The work expended over the entire work out is thus 30 * 300 ft-lbs = 9000 ft-lbs. Since P = W/t, the power output is P = 9000 ft-lbs/10s = 900 ft-lbs/sec, which is about 1222 watts.
5105.8 J
an object uniformly accerlerates over a distance of 100 m in 20 seconds. calculate the acceleration.
The power during the lift is (weight of the barbell in Newtons)/4.4 watts.Note:Power is not "expended". Energy is. Power is the rate at which energy is expended.
The distance travelled, measured in miles divided by the time taken, measured in seconds.
Count the time in seconds between a lightning flash and the thunder clap. Five seconds delay equals 1 mile in distance.
You can't convert between seconds, and meters/second. If you have a problem that involves speeds, use the formula: distance = speed x time.
Not enough information. But basically, you need to measure or calculate the distance, and then divide the distance by the time.
average speed = (distance) / (time to cover the distance) = (80/2.5) = 32 ft/sec.We know that the speed was not constant during the 2.5 seconds. But with the information given,32 ft/sec average is the only thing we can calculate.
MPH = miles per hour. In order to calculate hours from seconds, you just need to know that there are 3,600 seconds in an hour.
If distance could be converted to time, then you would be able ... in principle ... to calculate how many seconds of ribbon it takes to wrap a birthday present.
If you count the number of seconds from when you see the flash of lightening to when you hear the thunder, you will have a rough estimate as how far the storm is.
if you are given the mass of an object in pounds