Give an example of something you could do to reduce friction.
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167.67 Joules of work are done by the gravitational force on the crate.
Force is defined as the product of the mass of the object and acceleration. The SI unit of the force of Newton.
Gravitational force is the force applied by gravity on an object. The gravity of the earth is 9.8 m/s².
Force = Mass × Acceleration
F = m × a
Mass of the crate = 10 kg
The initial speed of the crate = 1.50 m/s
The pulling force = 100 N
Horizontal angle made by the crate = 20 °
Coefficient of kinetic friction = 0.400
The crate is pulled to a height of 5 m.
Work done by the gravitational force on the crate is,
Work done by gravitational force = mass × gravity × height
Therefore, 167.67 Joules of work is done by the gravitational force on the crate.
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