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What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 second? Explain your answer and state why this question is an exercise in careful reading as well as in physics.
A 8 kg box slides d = 4.2m down the frictionless ramp, after that collides with a spring whose spring constant is 250 N/m. angle is 30 degrees.
how high above the target must the rifle barrel be pointed.
A thin soap film (n = 1.33) has the uniform thickness. When white light strikes the film at normal incidence, blue light (b = 440 nm) is constructively reflected.
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
An object has a kinetic energy of 303 J and the momentum of magnitude 22.9 kg·m/s. Find the speed and the mass of the object.
How several 90-rm W, 120-rm V light bulbs can be connected to a 20-rm A, 120-rm V circuit without tripping the circuit breaker.
A 14 g ball of clay travelling east at 3.0 m/s collides with a 30 g ball of clay travelling north at 2.00m/s. What are the speed and the direction of resulting 44 g ball of clay.
The position of an air-track cart that is oscillating on a spring is given by the equation x = 12.4 cos[(6.35 s-1)t] . At what value of t after t= 0.00s in the cart first located at x = 8.47 cm ?
How much work did the movers do pushing a 160 kg crate 10.3 m across a rough floor without acceleration, if the effective coefficient of friction was 0.50.
The student throws a ball into the air along a path that he judges to make an initial angle of 59° with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes ball to rise verticall..
A kayaker needs to paddle north across a 200 wide harbor. The tide is going out, creating a tidal current that flows east at 2.0. The kayaker can paddle with a speed of 3.0. In which direction must he paddle in order to travel straight across the har..
Estimate the current in an L-R circuit for t>T if the EMF is (12/T) t for 0
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