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Get college assignment help at uniessay writers a24.0Kg box slidesdown an incline

A woman stands on a scale in a moving elevator. Her mass is 60.0 kg. Starting from rest, the elevator acclerates upward. During the acceleration, there is a tension of 9410 N in the hoistering cable. What is the reading on the scale during the acceleration?

You drop a single coffee filter of mass 1.1 grams from a very tall building, and it takes 50 seconds to reach the ground. In a small fraction of that time the coffee filter reached terminal speed.

A long wire lying along the x-axis carries a current of 1.00 A in the x direction. There is a uniform magnetic field present, given by B=0.003i 0.004j 0.002k, (where i, j, k are the unit vectors along the cartesian coordinate axes’) in units of Tesla. Calculate the y-component of the magnetic force acting on a segment of wire of length L = 12.0 cm

A bullet is fired vertically into a 2.00 block of wood at rest directly above it. If the bullet has a mass of 28.0 and a speed of 390 , how high will the block rise after the bullet becomes embedded in it?

A cannonball launched with an initial velocity of 141 m/s at and angle of 30° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it going when it hits the balloon?

A 1100 N crate is being pulled across a level floor by a force F of 325 N at an angle of 33° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the magnitude of the acceleration of the crate.

Ricardo, mass 86 kg and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 30 kg canoe. When the canoe is at rest in the placid water, they exchange seats, which are 3.0 m apart and symmetrically located with respect to the center of the canoe. Ricardo notices that the canoe moved 50.3 cm relative to a submerged log during the exchange and calculates Carmelita’s mass, which she has not told him. What is it?

A car travels with constant acceleration along a straight road. It was at the origin and at rest at = 0 its position is = 146 at = 5.30 .What was the car’s position at = 3.50 ?

It has been suggested that rotating cylinders about 8 mi long and 6.1 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?

Get college assignment help at uniessay writers A motorist is traveling at 12 m/s when he sees a deer in the road 43 m ahead. If the maximum negative acceleration of the vehicle is -7 m/s/s, what is the maximum reaction time (delta)t of the motorist that will allow him to avoid hitting the deer? Answer in units of s.

28. A 0.400-kg bead slides on a curved wire, starting from rest at point in Figure P5.28. If the wire is frictionless, find the speed of the bead (a) at and (b) at .

A car of mass M = 1200 kg traveling at 55.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car’s tires. What is the radius r of the turn if theta = 20.0 (assuming the car continues in uniform circular motion around the turn)?

Sam, whose mass is 61.0 kg, takes off down a 49.0 m high, 9.00^circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam’s speed at the bottom is 45.0 {rm m/s}. What is the coefficient of kinetic friction of his skis on snow?

A uniform 165-N bar is supported horizontally by two identical wires A and B (the figure ). A small 185-N cube of lead is placed 3/4 of the way from A to B. The wires are each 75.0cm long and have a mass of 5.50 g.

You tie a string to a rock and twirl it at a constant speed in a horizontal circle with a radius of 1.30 m, 2.10 m above the ground. The rock comes loose and travels as a projectile a horizontal distance of 9.40 m before striking the ground. (a) What was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string?

A 2.0 kg block is attached to a string that is wrapped around a 4.0 kg, 4.0-cm-diameter hollow cylinder that is free to rotate. (Use the figure below, but treat the cylinder as hollow.) The block is released 3.0 m above the ground. What is the speed of the block as it hits the ground?

A hiker’s trip consists of three segments. Path A is 8.0km long heading 60 degrees north of east. Path B is 7.0km long in a direction due east. Path C is 4.0km long heading 315 degrees counterclockwise from east. a) graphically add the hiker’s displacement in the A, B, C b) graphically add the hiker’s displacement in the C, B, A

A rocket moves upward, starting from rest with an acceleration of 29.9 m/s2 for 3.31 s. It runs out of fuel at the end of the 3.31 s but does not stop. How high does it rise above the ground?

Block A in the figure weighs 58.0 N. The coefficient of static friction between the block and the surface on which it rests is 0.350. The weight w is 11.1 N and the system remains at rest.

A loudspeaker of mass 18.0 is suspended a distance of = 2.40 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.70

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November 3, 2019