I Need Help With These Questions, I Have No Idea How To Solve Them. Lol, 1. Calculate The Work Done By A 47 N Force Pushing A Pencil 0.26 M., 2. How M
I need help with these questions, I have no idea how to solve them. LOL
1. Calculate the work done by a 47 N force pushing a pencil 0.26 m.
2. How much work is it to lift a 20 kg sack of potatoes vertically 6.5 m?
3. A 25 N object id 3.0 meters up. How much potential energy does it have?
4. How much power does it take to lift 30.0 N 10.0 m high in 5.00s?
5. A car uses 2,500 Joules in 25 seconds. Find power.
Using these formulas:
Work = Force x displacement
Work = mass x earths gravity x height
PE = Force x height
Power = (Force x height) / time
Power = Energy / time
1. Find Work.
W = Fd
W = (47 N)(0.26 m)
W = Joule, use calculator
2. Find Work.
W = mgh
W = (20 kg)(9.81 m/s/s)(6.5 m)
W = Joule, use calculator
3. Find PE.
PE = Fh
PE = (25 N)(3 m)
PE = Joule, use calculator
4. Find Power.
P = Fh/t
P = (30 N)(10 m) / (5 s)
P = Watts, use calculator
5. Find Power.
P = E/t
P = 2,500 J / 25 s
P = Watts, use calculator
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