Calculate the kinetic energy in joules of an automobile weighing 2135 lb and traveling at 55 mph. (1 mile = 1.6093 km, 1 lb = 45
1 answer:
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Answer: 81.619 kJ
Explanation:
Given
Mass of roller coaster is
It reaches the steepest hill with speed of
Hill to bottom is 51 m long with inclination of
Height of the hill is
Conserving energy to get kinetic energy at bottom
Energy at top=Energy at bottom
Answer:
Yes it is better to pull the rope rather than push it
Explanation:
Let the force is applied at an angle of 60 degree
so we will have net vertical force on the crate is given as
here we know
now friction force on the crate is given as
Yes it is better to pull the rope rather than push it