W=F*s =40N*7m
=280Nm or 280J
Moraa orina answered the question on April 9, 2018 at 16:34
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State possible ways of reducing friction
(Solved)
State possible ways of reducing friction
Date posted:
April 9, 2018
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Answers (1)
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Explain why a magnetic material is attracted by a magnet
(Solved)
Explain why a magnetic material is attracted by a magnet
Date posted:
April 9, 2018
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State the limitations of friction
(Solved)
State the limitations of friction.
Date posted:
April 9, 2018
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Answers (1)
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Date posted:
April 9, 2018
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Answers (1)
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(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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If the two masses...
(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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. A bullet of mass 20g is shot from a gun of mass 20kg with a muzzle velocity of 200m/s. if the bullet is
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(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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(Solved)
Differentiate between elastic collision ana inelastic collision
Date posted:
April 9, 2018
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Answers (1)
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(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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Explain why the bristles of a paint brush cling together when removed from water in a bucket
(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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A man of mass 75kg stands on a weighing machine in a lift. Determine the reading on the weighing
machine when the lift:
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(Solved)
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Date posted:
April 9, 2018
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Answers (1)
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(Solved)
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Date posted:
April 8, 2018
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Answers (1)
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A ball of mass 35g travelling horizontally at 20m/s strikes a barrier normally and rebounds with a speed
of 3m/s. Find the impulse exerted on...
(Solved)
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Date posted:
April 8, 2018
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Answers (1)
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Two stones of mass 8kg and 4kg move with velocities 3m/s and 6m/s respectively. Compare their momentum.
(Solved)
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Date posted:
April 8, 2018
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Answers (1)
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(Solved)
Jet fighter on practice moving at a velocity of 20m/s released a bomb above the ground which hits the
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Date posted:
April 8, 2018
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Answers (1)
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A stone is thrown at a velocity of 30m/s to the horizontal by a girl at the top of a tree whose height is 30m....
(Solved)
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Date posted:
April 8, 2018
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Answers (1)
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An object is released to fall vertically from a height of 20m. At the same time, another object is projected
vertically upwards with a velocity...
(Solved)
An object is released to fall vertically from a height of 20m. At the same time, another object is projected
vertically upwards with a velocity of 40m/ss
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Date posted:
April 8, 2018
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Answers (1)
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A particle travelling in a straight line at 2m/s is uniformly accelerated at 5m/s2 for 8seconds. Calculate the displacement of the particle.
(Solved)
A particle travelling in a straight line at 2m/s is uniformly accelerated at 5m/s2 for 8seconds. Calculate the displacement of the particle.
Date posted:
April 8, 2018
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Answers (1)
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A particle moving with a velocity of 200m/s is brought to rest in 0.02s. What is the acceleration of the particle?
(Solved)
A particle moving with a velocity of 200m/s is brought to rest in 0.02s. What is the acceleration of the
particle?
Date posted:
April 8, 2018
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Answers (1)
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A body moves 30m due east in 2seconds, then 40m due north in 4seconds. Determine its:a) Average speed.
(Solved)
A body moves 30m due east in 2seconds, then 40m due north in 4seconds. Determine its:
a) Average speed.
Date posted:
April 8, 2018
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Answers (1)