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A 60 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
m
Two equally charged particles, held 4.7 × 10-3 m apart, are released from rest. The initial acceleration of the first particle is observed to be 7.2 m/s2, find the mass of the second particle
The 14C atom undergoes an explosion and decays into a nucleus, an electron, and a neutrino. From this determine the speed of the recoiling nucleus
Two 4.0-g spheres are suspended by 9.0-cm-long light strings. determine the electric field intensity that enables the spheres to be in equilibrium at ? = 12°
Assuming that the mass of the planet is distributed with spherical symmetry, what is its mass.
A dockworker applies a constant horizontal force of 85.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. What is the mass of the block of ice
A father racing his son has 1/4 the kinetic energy of the son, who has 1/3 the mass of the father. The father speeds up by 1.5 m/s and then has the similar kinetic energy as the son.
A major-league catcher gloves a 93 mi/h pitch and brings it to rest in 0.14m. If the force exerted by catcher is 803 N, what is the mass of the ball.
A triangle has its corners located at the points (x,y) = (12.00,15.00), (x,y) = (9.00,8.00) and (x,y) = (0,0). Calculate the area of the triangle
A series circuit is connected to a 220-V, 60-Hzpower supply. The circuit has the following components: a 16? resistor, Compute the rms voltage across the resistor
A baseball and a bowling ball are both rolled off a level table at the same time. which will hit the ground first
A car is driven east for a distance of 47 km, then north for 25 km, and then in a direction 29° east of north for 29 km. find (a) magnitude (in km) of car's total displacement from its starting point and (b) the angle (from east) of the car's total..
Two earthquake waves of the same frequency travel through the same portion of the Earth, What is the ratio of the amplitudes of the two waves
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