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A man pushes horizontally with a force of 240 Newton on a 45 kilogram crate to move it across a level floor. The coefficient of kinetic friction is 0.35.
(a) Evaluate what the magnitude of the frictional force?
N
(b) Evaluate the magnitude of the crates acceleration?
m/s2
A baseball catcher puts on an exhibition by catching a 0.150-kg ball dropped from a helicopter at a height of 100m above the catcher. what average force is exerted on the mitt by the ball
Consider a wet roadway banked, where there is a coefficient of static friction of .30 between the tires and the roadway. what is the maximum speed the automobile can have
this is modern physics not classical physics.an electron and a proton are each accelerated starting from rest through a
Two in-phase loudspeakers are some distance apart. What is the spacing between points where constructive interference occurs? The speed of sound in air is 343 m/s
A 212-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. evaluate the tension in the rope
a certain substance has a dielectric constant of 3.06 and a dielectric strength of 15.0 mvm. if it is used as the
The total area of an airplane's wings is 40.0m2 and it's weight is 49.0KN. the density of air is 1.3kg/m3. calculate the speed over the bottom surface
A baseball pitcher can throw a ball with a speed of 70m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in the direction, and it floats toward you at a lazy 10 m/s.
Find out the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times.
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density, E=sigma/2epsilon, derive the electric field
Two lenses, one converging with a focal length of 20.0cm and one diverging with a focal length of -12.0cm, Find the final image from the second lens. Follow the sign conventions
If you touch the terminal of a battery, What current will pass through your body if you touch the two terminals of a 9.0 V battery with your two hands
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