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A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal.
a) How many forces act on the crate? (identify them).
b) How much work does each force produce?
c) What is the total work done on the crate?
A neutron with mass of approximately 1.00 u and speed of 100 m/s strikes the nucleus of a lead atom head-on. how fast will each particle move after the impact
Water flows at 5.0;{rm L}/{rm s} through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What does the other pressure gauge read.
Suppose that the speed of the water in the reservoir is zero, and that the water flow is steady. Overlook both air resistance and the height difference between the reservoir and the muzzle.
what would the image distance be (pay attention to sign)? cm d. Could the new image be projected on a screen?
A bartender slides a beer mug at 1.6 m/s towards a customer at the end of a frictionless bar that is 1.6 m tall. What are the speed and direction of the mug at impact
A wave on a string has a speed of 151 m/s. If the diameter of the string is increased by a factor of four and the tension is held fixed
A projectile is fired at such an angle from the horizontal that vertical component of its velocity is 49 m/s. The horizontal component of its velocity is 61 m/s.
Boy is stands on a scale in an elevator that is accelerating upward. Scale reads 723.8 N. Find magnitude of the acceleration of the elevator
A car is traveling 72.0 km/h when the driver applies the brakes. If if car slows down uniformly with an acceleration of -4.5 m/s2, how far does the car travel before coming to rest.
A ball of mass M = 17 kg is suspended from a vertical inextensible string of length l = 1.5 m. A bullet of mass m = M/2 traveling with a horizontal velocity v = 9sqrt(g*L) collides with the ball, What is the velocity of the ball-bullet system
A person who weighs 620 N stands at x = 5m, right on the end of a long horizontal diving board that weighs 350 N. The diving board is held up by two supports, one at its left end at x = 0, and one at the point x = 2.00 m.
The gearshift lever AB for the transmission of a sports car has position vector r whose line of action passes through points A and B. The driver applies the force F to the knob B of the lever to shift gears. Find out the magnitude of the component..
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