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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