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The driver of a car, with a mass of 2000 kg and speed of 25 m/s, sees a traffic red light 30 meters away and had to stop. (Hint: Think about work done on the car)
How much force is being applied altogether on the wheels of his car?
A ball of moist clay falls 17.7 m to the ground. It is in contact with the ground for 15.0 ms before stopping. What is the average acceleration of the ball
A 7 kg fish is swimming at 1.8 m/s to the right. He swallows a 1.0 kg fish swimming toward him at 3 m/s. what is the velocity of the larger fish
Meteors ("shooting stars") are very common; you may see one by accident any night.
A converging lens has a focal length of f = 43 cm for blue light and f = 53 cm for red light. An object is placed 140 cm in front of the lens and is illuminated with white light. How far apart are the two images
A person in a rocking chair completes 15 cycles in 17s, What are the period of the rocking
A rock is thrown vertically upward with a speed of 17.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. A) In how many seconds after being thrown does the rock strike the ground? B) What is the speed of the rock ..
The filament in an incandescent light bulb is made fromtungsten. The light bulb is plugged into a 60 V outlet and draws a current of 1.12 A. how long must the wire be
Determine the moment of inertia of the wagon wheel for rotation about its axis.
A magnetic field is perpendicular to a 0.0417 m x 0.0636 m rectangular coil of wire that has 108 turns, What is the magnitude of the change in the magnetic field
At an air show, a jet plane has velocity components v_x = 645km/h and v_y = 415km/h at time 4.00s and v_x = 878{km/h and v_y = 450km/h at time 6.77s. For this time interval, find the direction of its average acceleration
A sinusoidal EM wave has an electric field amplitude Em = 30.6 mV/m. What is the average energy density
A pulse of light in air is incident on a medium with an indcident angle of 34 degrees. The velocity of light in the medium is 0.5 that of the speed of light. Find the refracted angle of the light in degrees.
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