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Question1
A child slides down a slide with a 31 degree incline, and at the bottom her speed is precisely one-third what it will have been if the slide had been frictionless. Compute the coefficient of kinetic friction between slide and child.
Question2
Two asteroids, drifting at constant velocity, collide. The masses and velocities of the asteroids before the collision are indicated.
Throughout the collision, is the magnitude of the force of asteroid A on asteroid B greater than, less than, or equal to magnitude of the force of asteroid B on asteroid A?
Mass A= 500 kg Velocity of A= 20 m/s
Mass B=250kg Velocity of B= 10m/s
A block weighing 15.0 N is attached to the lower end of a vertical spring (k = 122.0 N/m), What is the maximum kinetic energy of the block as it oscillates
A 2 kg mass is placed at rest against a spring of spring constant 5 N/m, which is compressed by 10 cm from its equilibrium position. find the amount of potential energy stored in the spring
How many J of energy must be removed when 156 g of steam, at a temperature of 175.0 °C, is cooled and frozen into 156 g of ice at 0 °C.
What is an angular acceleration
A 280-kg piano slides 4.3 m down a 30o 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.
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. determine the magnitude of the deceleration
A point charge with a charge q1 = 2.60?C is held stationary at the origin. How much work is done by the electric force on q2
How many electrons would have to be added to one of these spheres to make it electrically neutral?
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 56.1° and 48.5°, respectively
Two moles of an ideal gas undergo a reversible isothermal expansion from 3.25×10-2 to 4.59×10-2 at a temperature of 21.7. what change of entrophy delta s of the gas.
What is he wavelength of a 22.75*10^9 Hz radar signal. What is the frequency of an X-ray with wavelength 0.12nm
How much time does the ball spend in the air. What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits green.
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