Ws 09001 Name Date Work Problems 1

ws 09001 name __________________ date ___________________ work problems 1. and 80.0kg person carries a 25n package up a fl

ws 09001 Name __________________
Date ___________________
Work Problems
1.
And 80.0kg person carries a 25N package up a flight of stairs. The
vertical height of the stairs is 10.0m. How much work is done?
(8100J)
2.
A force of 1800Nis needed to keep a piano from sliding down a
10.0m ramp. How much work is done? (Zero)
3.
A child pulls a sled through the snow with a force of 45N applied
to the rope at an angle of 30.0degrees with the horizontal.
a.
How much work is done if they moved 15m? (584J)
b.
How much work would have been done if the rope had been pulled
horizontally with the same force? (675J)
4.
It takes 7500J of work to slide a crate a distance of 15m across a
floor. A force of 650N was applied to the rope. What angle did the
rope make with the ground? (39.7 degrees)
5.
It took a force of 250N to pull a crate weighing 765N across the
floor. The work done was 3500J. How far was the crate moved? (14m)
6.
The third floor of a house is 8.0m above the street level. How
much work is required to move a 150.kg refrigerator up to the
third floor? (11,760J)
7.
A crane lifts a 2.25x103N bucket containing 500.kg of dirt to a
height of 7.50m. Calculate the work performed in (a) N-m (b)
joules (same units 54,375J)
8.
How much work must be done to lift a 49kg crate a distance of
10.m? (4800J)
9.
A man carries bricks, weighting 30.N each, up a ladder onto a
scaffold 10.m high. He can carry 8 bricks per minute. How much
work is done by the worker in
a.
30.min (b) 2 hours? (72,000J, 288,000J or 72kJ, 288kJ)
10.
A tractor pulls a plough through a field. The tension (force) on
the rope is 2000.N. It makes an angle of 40degrees with the
ground. If the field is 300m long, how much work is done?
(459,600J)
11.
A man throws a rope around a lion and drags him across the floor.
He needs a force (tension) of 400.N to do this. The rope makes an
angle of 40.degrees with the floor. What work is done if the lion
is dragged 50.m? (15,321J)
12.
An 8.0m ramp is used as an inclined plane to push a safe onto a
truck platform that is 2.0m above the ground. If the safe weighs
1800N what force is needed to push it up the ramp? (450N)
13.
A certain set of pulleys enables the operator to lift a load
weighing 1000.N by applying a 100.N force. How much rope must the
operator pull in to make the load rise 3.0m? (30 m rope)