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Q1. Travelling at the speed of 14.10 m/s, driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.650. What is the speed of automobile after 1.130 s have elapsed? Overlook the effects of air resistance.
Q2. Suppose that you lob the ball with an initial speed of v = 17.0m/s, at an angle of θ = 50.7° above the horizontal. At this instant your opponent is d = 11.7m away from the ball. He begins moving away from you 0.300s later, hoping to reach the ball and hit it back at the moment that it is h = 2.18m above its launch point. With what minimum average speed should he move? (Overlook the fact that he can stretch, so that his racket can reach the ball before he does.)
Write down an energy transformation equation
If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
A proton starting from rest is accelerated in a cyclotron to a speed of 3.0•106 m/s. Find the work done on a proton by the electrical force of the cyclotron.
How to find out the magnitude of the acceleration
NASA sends a satellite to another planet by placing the satellite in a Keplerian orbit (around the sun) such that the perihelion is at the radius of the Earth's orbit (1 AU) and the aphelion is at the radius of the planet's orbit. Most of the trip is..
Illustration on Eratosthenes' process
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
An insulated Thermos contains 210 cm3 of hot coffee at 88 °C. You put a 19.00 g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though..
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
Find out the vertical component of the reaction force
Find out the edge dimension of each cube
What are the rocket's horizontal range, greatest height, and total time of flight. The magnitude of the torque of this force on the door with respect to the hinge is most nearly .
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