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A person initially at rest 8 m from the center of a rotating platform covers a distance of 120 m in 20 s
(a) What is the angular acceleration of the platform?
(b) What is the angular velocity after 4 s?
Derive the equation for motion of the object starting from the force equation. Show each step and find the time at which it reaches ground and it's speed when it hits the ground.
two toy locomotives approach each other along the same line and upon collision both stop dead still. one locomotive has
A train slows from 40m/s to 10m/s in 3 seconds . If its mass is 50000kg what was the change in momentum? What was the train's impulse
A car is traveling along a straight road at a velocity of +35.2 m/s when its engine cuts out. Find the velocity of the car at the end of the initial 1.71-second interval
Do you believe that there was sufficient financial information to make a solid decision on what to do?
A 1200 kg automobile crashes into a brick wall, collapsing thefront end 1.5 meters. If the averge retarding force applied by the brick wall to the automobile is 2000 N through out the entire time of crash, what was the speed of the automobile just..
the electric field strength is 50000 nc inside a parallel-plate capacitor with a 2.0mm spacing. a proton is released
A cylinder is rotating about an axis that passes through the center of each circular end piece. The cylinder has a radius of 0.0850 m, an angular speed of 88.0 rad/s, and a moment of inertia of 0.850 kg · m2. A brake shoe presses against the surface ..
in 1971 apollo 15 astronaut david scott dropped a hammer and feather on the moon. the feather fell a distance of 0.73 m
A cruise ship leaving port travels 55.0 km 45.0° north of west and then 66.0 km at a heading 30.0° north of east. Find the displacement vector's magnitude and direction
A laser emits a cylindrical beam of light 2.6 mm in diameter. what is the rms value of the electric field in the laser beam
An arrow is shot off the top of a bridge of unknown height. The speed of the arrow at launch is known to be 30.0 m/s. How tall is the bridge
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