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Q. Besides the gravitational force, a 3.10-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (5.15{i} - 3.30{j}) m, where the direction of {j} is the upward vertical direction.
Determine the other force and write it in component form (both components rounded to one decimal)
Q. A 350 kg piano slides 3.5 m down a 27 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. Calculate the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 50 N. If he does 4 x 10^2J of work on the sled while exerting the force horizontally, through what distance must he have pushed it.
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
A freight company uses a compressed spring to shoot 1.7 kg packages up a 1m high frictionless ramp into a truck. The spring constant is 241 N/m and the spring is compressed 33 cm.
A 27 pound meteorite struck a car, leaving a dent 26cm deep in the trunk. If the meteorite struck the car with a speed of 620m/s, what was the magnitude of its deceleration, assuming it to be constant.
Find out the critical angle theta_ce for e-waves in calcite. The index of refraction for light with electric field parallel to the optical axis (called extraordinary waves or e-waves) is 1.4864. The index of refraction for light with electric fiel..
An airplane needs to reach a velocity of 407 km/h to take off. On a 2000m runway, what is the least acceleration necessary for the plane to take flight.
A skier is accelerating down a 30 degree hill at 3.60 m/s^2. How long would it take her to reach the bottom of the hill, assume she starts from rest and accelerates uniformly, if elevation change is 170m.
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
If a 200 N force F1 is applied to the piston with the 4 cm diameter, Calculate the magnitude of the force F2 that can be resisted by the piston with the 10 cm diameter? Ignore the weights of the pistons.
A ball is thrown from the top of a building upward at an angle of 39degrees to the horizontal and with an initial speed of 24m/s. The ball is thrown at a height of 57 m above the ground and hits the ground 98.55 m from the base of the building. Wh..
A 2 kg rock is released from rest at a height of 29 m. neglect air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights: 20m; 15m; 5m; 9m.
Find the von Mises stress (in MPa) at the location of the strain gages.
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