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A man pushes a lawn mower on a level lawn with a force of 212N. If 52% of this is directed downward, how much work is done by the man in pushing the mower 4.8 m.______J
a) what is the kinetic energy in joules of a 1060-kg automobile traveling at 94 km/h._______Jb) how much work would have to be done to bring a 1060-kg automobile traveling at 94 km/h to a stop.______________J
a man at point a directs his rowboat due north toward point b straight across a river of width 100 m. the river current
The two blocks (m = 30 kg and M = 100 kg) in the figure below are not attached to each other. The coefficient of static friction between the blocks is µs = 0.49, but the surface beneath the larger block is frictionless.
Calculating plants maximum possible thermal and actual efficiency.
a projectile passes point a with a velocity v upward. at some time later the projectile passes point b with a velocity
The equation for the displacement in meters of an object moving in SHM is x(t) = 1.50 cos (4.20t) where t is in seconds. At what time does it first reach the maximum speed
A peregrine falcon dives at a pigeon. The falcon starts with zero downward velocity and dives with the free-fall acceleration. how long does it take the falcon to intercept the pigeon
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
a person moves a full sam's club shopping cart mass=80.0 kg from rest to a velocity of 1.30 m/s over a distance of 1.80 meters to secure a spot in check out line. Determine the change in the chart's momentum
A hedgehog pushes a rock of 1.9 kg up a ramp, which is tilted at 19.5 degrees to horizontal, How much work is done by friction
The total kinetic energy in one mole of nitrogen is 4,000 J. what is the root mean-square velocity of an individual particle in the ideal gas
A guitar string of diameter 0.79 mm and length 1 m is subject to a tension of 182 N. what is the Young's modulus of the string
A spherical asteroid has a radius of 545 km and a surface g of 3.0 m/s2. What is the mass of the asteroid, What is the potential energy of a 1 kg object on the surface
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