Force & Work
When 82 Newtons of work is done over a distance of 56 meters, how much work is done?
4592 J of work is done
What is the kinetic energy of a 2 kg ball moving at 5 m/s?
The answer is 25 J.
A point of application of a force of 69 N is moved By 42m. the work done is:
W=2898 J
A car is moving with a speed of 69 miles per hour . If the mass of the car is 950 kg, then what is its kinetic energy?
The Kinetic Energy is 451945.104379 J
During a race, a runner impacts the ground with a force on his foot of 200 N. If he runs a distance of 30 m, how much work does the runner do?
The work done by the runner is 6000 J.
A car with a mass of 1500 kg is traveling at a speed of 25 m/s. What is the car's kinetic energy?
The car's kinetic energy is 484,375 J.
What is the equation for calculating work (W) when force (F) and displacement (s) are known?
W=Fs
Warning: This is the Last question on Kinetic Energy before you get to the REAL QUIZ. (500 pts) Are you sure you want to proceed? alright. Here we go!
A car of mass 800kg accelerates from 2m/s to 4m/s. What is the increase in kinetic energy?
The increase in Kinetic energy is +4800 J
Clarissa climbs into the back of the truck to tie the lawn mower in place. The back of the truck is 1.1m above the ground. If she does 528 joules of work raising herself to the truck bed, how much does she weigh?
Clarissa weighs 478.44 N (That's 107.55759074 lbs!)
Warning: You have been lured into a trap. This is your LAST CHANCE TO TURN BACK!
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..? What? you really want to challenge yourself? Alright. here we go.
A puck on ice, with mass of 5 oz, is moving at 100 mph. It collides with a stationary, heavier puck, with mass of 6 oz. After the collision, the pucks move together. Calculate the final velocity v2 of both pucks, and determine how much of the initial kinetic energy was converted into heat and sound. (ΔE)
Pity Hint: KE = 1/2 * mass * velocity^2.
Answer 1: V2 = 20.32 mps
Answer 2: ΔE = 77.01 J