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Q. A 240-g block is pressed against a spring of force constant 1.20 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60.0° to the horizontal. Using energy considerations, determine how far up the incline the block moves from its initial position before it stops under the following conditions.
Q. A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad.Calculate the athlete's velocity just before reaching the pad.
A 1000 kg experimental rocket sled on a level frictionless rail is loaded wiht 50kg of propellant. It exhausts the propellant in a 20-s "burn". If rocket, initially at rest, moves at 150m/s after the burn, what impulse is experienced by the rocket..
How far above the aim is the point
A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater.
A step-up transformer has 300 turns on its primary coil and 90000 turns on its secondary coil if the current flowing through the secondary is 5 amps what is the current flowing in the primary.
A 23.00 kg chair initially at rest on a horizontal floor requires a 364N horizontal force to set it in motion. Once the chair is in motion, a 328N horizontal force keeps it moving at a constant velocity. A 23.00 kg chair initially at rest on a horizo..
A ball on the porch rolls 60 {rm cm} to the porch's edge, drops 40 {rm cm}, continues rolling on the grass, and eventually stops 80 {rm cm} from the porch's edge.
Find out an effective coefficient of kinetic friction
The squadron commander has the mandate that the database update should be complete in less than one minute. If the topo database is 20 GB, and link is SONET, what is the minimum standard rate necessary.
Two ocean liners, each with a mass of 38,000 metric tons, are moving on parallel courses, 92 m apart. What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction? Treat the ships as par..
A rectangle measuring 30.0 {rm cm} by 40.0 {rm cm} is located inside a region of a spatially uniform magnetic field of 1.30 T, with the field perpendicular to the plane of the coil. The coil is pulled out at a steady rate of 2.00 {rm{ cm/s}} travelli..
A bumper car with mass m1 = 116 kg is moving to the right with a velocity of v1 = 5 m/s. A second bumper car with mass m2 = 96 kg is moving to the left with a velocity of v2 = -3.8 m/s. The two cars have an elastic collision. Suppose the surface is f..
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
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