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☆☆☆☆☆Cards in this guide (11)
Four students are moving 80 N boxes from the floor to a shelf 4 meters high Student A moves 8 boxes in 10 minutes Student B moves 6 boxes in 8 minutes Student C moves 4 boxes in 6 minutes and st
student A
A sailor pulls a 2000 kilogram boat 25 meters along the dock with a rope attached to the boat that makes a 45 degree angle with the dock. How much work is done by the sailor if he exerts a force of 4
7,071 J
A man is carrying cement blocks weighing 200 newtons up a ladder to a platform 7 meters above the ground He has been carrying 2 blocks per minute How much work is done in 10 minutes
28,000 J
A man and a woman exert a total of 900 N by pushing a car 20 meters across the street The man exerts twice as much force as the woman How much work does the man do
The man exerts a force of 600 N and the woman exerts a force of 300 N. Work done by the man = Force x displacement = 600 x 20 = 12,000 J Hence, the man performs 12,000 joules of work.
Work is done when a force is applied to an object if the object
is moved
How much work is done when a 6.0 n weight is raised 2.0 meters off the ground
12j
A force of 20 N gives a ball an acceleration of 4.0 ms on a level frictionless surface what is the mass of the ball
F=ma
m=F/a
m=20/4.0
m=5Kg
How many newtons does a 10 kg box weigh
A 10 kg box weighs a touch more than 98 newtons (98.0665002864).
A man pulls a 50 kilogram box 20 meters across the floor with the aid of a rope tied to the box The rope makes an angle of 30 degrees with the horizontal In pulling the box the man exerts a force
1,732j
How many joules of work are done when a 20 newton box is lifted 5 meters off of the floor
100
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi
250 newtons
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