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The velocity of a ball changes from <9, -7, 0 > m/s to < 8.92, -7.12, 0 > m/s in 0.02 s, due to the gravitational attraction of the Earth and to air resistance. The mass of the ball is 130 grams.
(a) What is the acceleration of the ball?
(b) What is the rate of change of momentum of the ball?
(c) What is the net force acting on the ball?
Two parallel plates each of area 7.00 cm^2 are seperated by 3.50 mm of water The electric field between the plates has a magnitude of 2290 N/C, what is the charge stored on each plate
Assume the square wire loop is replaced with a smaller one, made of the same wire that is 0.02 m on a side, half as long as the original.
A 0.2 object is swung in a vertical circular path on a string 0.1 m long. The acceleration of gravity is 9.8 m/s^2. If a constant speed of 4.07 m/s is maintained, what is hte tension in string when the object is at the top of the circle? Answer in..
The 4 block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 77.
A 4.5 kg fish swimming 2 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt at once after lunch. What is the velocity v of the smaller fish before lunch.
There is a uniform electric field on both sides of a large plane. Its magnitude is 80 N/C and its direction is toward the plane, on each side of it
There is a uniform magnetic field present, given by B=0.003 i + 0.004 j + 0.002 k, where i,j,k are the unit vectors along the cartesian coordinate axes in units of Tesla. Compute the y-component of the magnetic force acting on a segment of wire of..
Danny's basis in his partnership interest was $26,500 and the partnership has no liabilities. If he sells his interest for $35,000, illustrate what is his gain or loss realized and recognized?
A 42.00kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A body of mass 200 g is acted upon by a force of 20 n. Find the acceleration of the body. If the body above is having a volume of 1000 cm3 estimate its density in kg/m2.
Presume a spherical planet P has a uniform density of 4.72 x 10^3 kg/m^3 and a radius R = 3604km. For a parcel that weighs 64N on the surface of the spherical Earth.
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
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