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Get college assignment help at uniessay writers A 73.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.90 m/s in 1.50 s. It travels with this constant speed for the next 5.00 s. The elevator then undergoes a uniform acceleration in the negative y direction for 1.70 s and comes to rest.

During the spin-dry cycle of a washing machine, the motor slows

During the spin-dry cycle of a washing machine, the motor slows from 80 rad/s to 40rad/s while the turning the drum through an angle of 120 radians. What is the magnitude of the angular acceleration of the motor?

A hunter aims directly at a target (on the same level)

A hunter aims directly at a target (on the same level) 100 m away. (a) If the bullet leaves the gun at a speed of 280 m/s, by how much will it miss the target? m (b) At what angle should the gun be aimed so as to hit the target?

A 160 N bird feeder is supported by three cables, as

A 160 N bird feeder is supported by three cables, as shown in Figure P4.13. Find the tension in each cable. 1 N (right cable tension) 2 N (left cable tension) Figure P4.13.

Estimate the skater’s moment of inertia to two significant figures

Estimate the skater’s moment of inertia to two significant figures

An athlete at the gym holds a 3.2 kg steel ball

An athlete at the gym holds a 3.2 kg steel ball in his hand. His arm is 76 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1.(a) Straight out to his side, parallel to the floor 2.(b) Straight, but 40° below horizontal

A 7.00 kg ball rolls down a 17.5 ramp. (a) What

A 7.00 kg ball rolls down a 17.5 ramp. (a) What is the acceleration of the ball?

An electron confined in a one-dimensional box emits a 300 nm

An electron confined in a one-dimensional box emits a 300 nm photon in a quantum jump from n=2 to n=1 .What is the length of the box?

A flywheel with a very low friction bearing takes 1.9 h

A flywheel with a very low friction bearing takes 1.9 h to stop after the motor power is turned off. The flywheel was originally rotating at 34 rpm. What was the initial rotation rate in radi- ans per second? Answer in units of rad/s.

A metal rod of length 19.2 cm and mass 101 g

A metal rod of length 19.2 cm and mass 101 g is free to slide over two parallel, horizontal metallic rails connected to a 10.0 V battery (see figure below). The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 2.02 T magnetic field is directed perpendicular to the plane of the circuit. (a) Find the magnetic force on the rod. F= 38.78 N (b) Find the rod’s speed after it has moved 29.4 cm, assuming negligible friction.

A flat (unbanked) curve on a highway has a radius of

Get college assignment help at uniessay writers A flat (unbanked) curve on a highway has a radius of 200 {rm m}. A car rounds the curve at a speed of 22.0 {rm m}/{rm s}What is the minimum coefficient of friction that will prevent sliding?

find the electrostatic potential and how much work it would take

find the electrostatic potential and how much work it would take to bring a charge from infinity. The full problem is in the image file

A 200 kg weather rocket is loaded with 100 {rm kg}

A 200 kg weather rocket is loaded with 100 {rm kg} of fuel and fired straight up. It accelerates upward at 31 m/s^2 for 33 s, then runs out of fuel. Ignore any air resistance effects.How long is the rocket in the air?

A 87g arrow is fired from a bow whose string exerts

A 87g arrow is fired from a bow whose string exerts an average force of 130N on the arrow over a distance of 80cm . What is the speed of the arrow as it leaves the bow?

A person stands in a stationary canoe and throws a 5.33-kg

A person stands in a stationary canoe and throws a 5.33-kg stone with a velocity of 6.16 m/s at an angle of 21.1 ° above the horizontal. The person and canoe have a combined mass of 100 kg. Ignore air resistance and effects of the water and find the horizontal recoil velocity (magnitude and direction) of the person and canoe.

Block 1, of mass = 4.10 , moves along a frictionless

Block 1, of mass = 4.10 , moves along a frictionless air track with speed = 15.0 . It collides with block 2, of mass = 21.0 , which was initially at rest. The blocks stick together after the collision.

A jetliner is moving at a speed of 235 m/s. The

A jetliner is moving at a speed of 235 m/s. The vertical component of the plane’s velocity is 42.9 m/s. Determine the magnitude of the horizontal component of the plane’s velocity.

A mass m1 = 13.5 kg and a mass m2 =

A mass m1 = 13.5 kg and a mass m2 = 11.0 kg are suspended by a pulley that has a radius of 9.8 cm and a mass of 3.2 kg (see figure). The cord has a negligible mass and causes the pulley to rotate without slipping. The pulley rotates without friction. Treating the pulley as a uniform disk, determine the tension in the right cord.

An unmarked police car traveling a constant 95km/h is passed by

An unmarked police car traveling a constant 95km/h is passed by a speeder. Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator.If the police car accelerates uniformly at 3.00m/s2 and overtakes the speeder after accelerating for 8.00 s , what was the speeder’s speed?

a bungee jumper undergoes simple harmonic motion with amplitude 4.8m and

a bungee jumper undergoes simple harmonic motion with amplitude 4.8m and frequency .105Hz. Assume the bungee jumper follows the simple harmonic motion equation x=Acos(wt) determine the bungee jumper’s velocity at .25s, .5s, and 1 s

What force is required to push it down a 6.0^circ incline

What force is required to push it down a 6.0^circ incline and achieve a speed of 66 km/h at the end of 75 {rm m}?

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