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Question1
A dock worker loading crates on a ship ?nds that a 24 kg crate, initially at rest on a horizontal surface, requires a 63 N horizontal force to set it in motion. Though, after the crate is in motion, a horizontal force of 47 N is necessary to keep it moving with a constant speed.
The acceleration of gravity is 9.8 m/s
Find out the coefficient of static friction between crate and floor.
Question2
When a piece of wood is pressed against a spring and compresses the spring by 4.00{rm cm}, wood gains a utmost kinetic energy K when it is released.
How much kinetic energy (in terms of K) would the piece of wood gain if the spring were compacted 15.8 {rm cm} instead?
Question3
A 135 g baseball, moving along x-axis with speed 33.0 m/s, strikes a fence at a 45 degree angle and rebounds along the y-axis with unchanged speed. Provide the x and y components of its change in momentum.
What is the change in kinetic energy of the puck
Write down the expression that shows the pressure
What is the magnitude
Find out the magnetic field strength
What is acceleration due to gravity
Find out the velocity of the rain
Find out the effective coefficient of kinetic friction
Find out speed of the proton
What is a stopping distance
How much time is necessary to catch the car
Status Newton's First Law of motion.
If frame rate increases what happens to the PRF
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