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Question 1: The x and y components of a vector A→ are -25.0 m +40.0 m. respectively. What is the angle between the direction of A→ and positive direction of x?
Question 2: The acceleration of a motorcycle is given by ax (t) = At - Bt2, where A = 1.50 m/s3 and B = 0.120 m/s4. The motor cycle is at rest at the origin at time t =0
a) Find its position and velocity as functions of time
b) Calculate the maximum velocity it attains at a time t = 12.5 s
A 250g ice cube at -10?C is placed in an aluminum cup whose initial temperature is 70?C. The system comes to an equilibrium temperature of 20?C
If random samples, each with n = 36 scores, are selected from a normal population with µ = 80 and ? = 18, how much difference, on average, should there be between a sample mean and the population mean?
Two astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 11 m?
A meter stick lies at the bottom of a 100cm long tank by its zero mark against the left edge. You look into a tank at 30 degree angle, by your line of sight gazing the upper left edge. (a) What mark do you see on the meter stick if the tank is empty?
A 3 kg mass attached to a k=27N/m spring slides on a frictionless horizontal surface as simple harmonic oscillator. At t=0, x=-0.2 and v=3m/s. Find the amplitude and max velocity
Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 152 bullets, Find the average force exerted on Superman's chest
suppose after the ball reaches the ground ,it bounces back straight upwards at the speed of half of the speed that it hits the ground, calculate the maximum height that the ball bounces
Given the moon's period about the earth is 27.32 days and the earth-moon distance is 3.84 x 108 meter, compute the mass of the earth
When responding to sound, the human eardrum vibrates about its equilibrium position. Find the maximum acceleration of the eardrum
A missile launcher, of mass 4400 kg, fires horizontally a rocket of mass 100 kg and recoils up a smooth inclined plane, rising to height of 4.0 m. discover the initial speed of the rocket.
You pull downward with a force of 24.1 N on a rope that passes over a disk-shaped pulley of mass 1.35 kg and radius 0.0785 m. Calculate the tension in the rope on both sides of the pulley
A 46 gram golf ball is hit and launched at 194.4 km/hr at 30 degrees above the horizontal. How much Kinetic energy does the ball have at the maximum height
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