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A person pushes horizontally by a force of 220 N on a 55 kg crate to move it across a level floor the coefficient of kinetic friction is 0.35
a) what is the magnitude of the frictional force
b) what is the magnitude of the crates acceleration.
A star of radius 9.1 × 10^5 km rotates about its axis with a period of 49 days. Estimate the period of the neutron star
a box of mass m1kg slides 20sqrt2m down an incline plane of angle pi4 and kinetic friction is 12.what are the
Illustrate at what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2 .
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 116 m, at what frequency must it rotate so that it simulates Earth's gravity?
find out the initial velocity of the ball. How fast will the electron be moving when it is very far away.
A cannon tilted upward at = 33 fires the cannonball with a speed of 99. At that instant, what is the component of the cannonball's velocity parallel to the ground.
An object is 12.0 cm from the surface of a spherical Christmas tree ornament that is 8.00 cm in diameter. What is the magnification of the image
In a PET scan, an electron and positron annihilate each other, creating two (massless) photons. What is the kinetic energy of each photon in this case
You have a pulley 11.8 cm in diameter and with a mass of 1.6 kg. You get to wondering whether the pulley is uniform. What is the moment of inertia if the pulley is uniform
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What is the speed of the galaxy relative to earth
A plane, diving with constant speed at an angle of 53.0° with the vertical, releases a projectile at an altitude of 750 m. The projectile hits the ground 7.00 s after release.
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 26 km/h and the μs between tires and track is 0.34?
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