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Question1
You encounters a moving walkway that is 91 long and has the speed of 2.1 relative to the ground. How long would it take you to cover the 91 length of the walkway if, once you get on walkway, you at once turns around and start walking in the opposite direction with a speed of 1.5 relative to the walkway?
Question2
A father (m = 73 kg) and son (m = 43 kg) are standing facing each other on a frozen pond. The son pushes on father and finds himself moving backward at 3 m/s after they have separated. How fast will the father be moving?
Question3
For a damped oscillator with a mass of 340 g, a spring constant 140 N/m and a damping coefficient of 71 g/s, what is the ratio of an amplitude of the damped oscillations to an initial amplitude at the end of 26 cycles?
A cat is trying to jump onto a countertop that is 1m tall from 0.3m away. The cat's initial jump speed (magnitude of the total initial velocity) is 10m/s
What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 second? Explain your answer and state why this question is an exercise in careful reading as well as in physics.
The frequency of a tuning fork is 358 Hz. Find the length of the shortest organ pipe which will give 6 beats/s with the fork. The velocity of sound in air is 339.1 m/s.
A motorist drives south at 28.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.20 min, find the average velocity and degree south of west
A circular coil 17.0 cm in diameter and containing eleven loops lies flat on the ground. Determine the magnitude of the torque on the coil
Net horizontal force due to rolling friction
A child pulls on a wagon handle at an angle 37° above the horizontal with a force of 45 N. what is the mass of the wagon
question1you hold a brick at rest in your hand. a how numerous forces act on the brick? b recognize these forces. c are
When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy, Determine the amount of water you lose to evaporation when running for 31 minutes at a rate that uses 400 kcal/h above your BMR
A bowling ball (mass = 7.2 kg, radius = 0.15 m) and a billiard ball (mass = 0.32 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
the plane of a flat, circular loop of wire is vertical. An external B-field is directed perpendicular to the plane of the loop. What is the direction of the external magnetic field
It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, Find the minimum speed of a lead bullet
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