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Imagine that a car's x-acceleration during a certain time period is given by the function ax(t)=-bt. If the car's x-velocity at t=0 is 32 m/s, and b=1m/s^3, how long will it take the car to come to rest?
a rocket takes off at an angle of 20deg from vertical. two observers are standing 20 miles away from the lunch site so
What is the temperature of the outside air. What are the components of the displacement vector from camp to summit? What is its magnitude? select the x axis east, y axis north, and z axis up.
The mass of a robot is 6210 kg. This robot weighs 3970 N more on planet A than it does on planet B. What is the difference MA - MB in the masses of these planets
A 25 kg bear slides, from rest, 12 m down a lodgepole pine tree, moving with a speed of 5.6 m/s just before hitting the ground. What is the average frictional force that acts on the sliding bear
Two runners start simultaneously from the same point on a circular 200-m track and run in the same direction. How far from the starting point will each have run at that instant
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 720 N person climb before the ladder begins to slip?
Speedy Sue, driving at 34.0m/s, enters a one-lane tunnel. She then observes a slow-moving van 175m ahead traveling with velocity 5.40 m/s. Sue applies her brakes but can accelerate only at 2.00 m/s2 since the road is wet. Will there be a collision..
a hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake.
An electromagnetic wave of wavelength 405 nm is traveling in vacuum in the -z direction. What is the magnetic-field amplitude of this wave
A rotating wheel requires 6.00 s to rotate 30.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
The size of the virtual image formed by a lens is 2 times the size of the object. Find the focal length of the lens
The pressure at the surface of the water will be 140kPa , and the depth of the water will be 13.8m . The pressure of the air in the building outside the tank will be 87.0kPa
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