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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.
find out the magnitude of an acceleration
What is an angular acceleration
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Compute the index of refraction of the gas
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Compute the amplitude and phase at the observation screen
Compute the ground state energy and wavefunction
What direction is white dot on the sensor pointing
What horizontal force is needed to hold bag in new position
What is an average speed
What is a density of the block
Show that the boundary conditions far away from the cylinder
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