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A box of mass is sliding down a frictionless plane that is inclined at an angle above the horizontal, as shown in the figure (Figure 2) . What is the work done on the box by the force due to gravity , if the box moves a distance ?
A 21.0-kg box rests on a frictionless ramp with a 14.3° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 38.4° with the horizontal, what is the smallest force F the mover will have to exert..
Megan's mass is 28kg. She climbs the 4.8m ladder of a slide and reaches a velocity of 3.2m/s at the bottom of the slide. How much work was done by friction on Megan? Assume that air resistance is negligible.
A 68kg woman stands on a very light, rigid board that rests on a bathroom scale at each end. She is standing 1.5m from one scale, and, 0.5m from the other. What is the reading on each of the scales.
while you take a bath, how many kilograms of hot water (50°C) have to you mix with cold water (11 °C) so that the temperature of the bath is 36 °C? The total mass of water (hot plus cold) is 194 kg. Ignore any heat flow between the water and its e..
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
A wheel that is rotating at 45 Rad/s is give an angular acceleration of 3 Rad/s (sqrd). Use gravity: 10 m/s, how long is the angular velocity of the wheel
You throw a 13 g rock and it leaves your hand at a speed of 17 m/s. What is the de Broglie wavelength of this rock
question1as standing at the edge of the roof of a building you throw a stone upward with an initial speed of 7.87 ms.
In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 85.7%, Find the number of SUVs in the lot
According to one estimate, the first atomic bomb released an energy equivalent to 20 kilotons of TNT. how much uranium was lost through fission in this bomb
A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks.
A satellite is in a circular orbit around and unknown planet. The satellite has a speed of 1.70 x10^4 m/s, and the radius of the orbit is 5.25 x106m. What is the orbital speed of the second satellite
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