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You push a crate across a rough floor against a constat force of friction. You first push with a force of 35N, the acceleration of the box is 0.80m/s^2; you then increase the force to 55N and the acceleration of the crate is now 1.75m/s^2.
A) Find the mass of the box?
B) Find the coefficient of kinetic friction between the box and the floor?
A student wearing frictionless in-line skades on a horizontal surface is pushed by a friend with a constant force of 23.00N. How far should the student be pushed, starting from rest, so that her final kinetic energy is 283J.
Calculate the period of a satellite orbiting the Moon, 130km above the Moon's surface. Ignore effects of the Earth
A space probe is traveling in outer space with a momentum that has a magnitude of 4.94 x 107 kg·m/s. Determine the momentum of the probe after the retrorocket ceases to fire
A motorcycle starts with a constant acceleration of 3.0 m/s^2. At just that instant a buick with a constant speed of 20 m/s passes the motorcycle, How fast is the motorcycle travelling when it overtakes the buick
A 28.0 g object moving to the right at 18.0 cm/s overtakes and collides elastically with a 9.0 g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision
Express the time in terms of given quantities. T catch = ? How far from Car B's starting line will the cars be when Car B passes Car A? Express your answer in terms of known quantities.
Matthew pulls his little sister Sarah in a sled on an icy surface (no friction) with a force of 60 N at an angle of 600 upward from the horizontal. Find acceleration of the sled
A nickel has a mass of about 5 grams. If all of this mass could be converted to energy, how many Hiroshima sized bombs would this be
A pulley system has an efficiency of 87.5 percent. How much of the rope must be pulled in if a force of 648 N is is needed to lfit a 150kg desk 2.46m .
A molecule consists of two atoms. How far from the first atom is the center of mass of the molecule
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
A small, 10.0 g insect stand at one end of a thin uniform metal rod which is initially at rest on a frictionless horizontal table. What is the resulting angular speed of the rod
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