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A 2004 Prius with a 150-lb driver and no passengers weighs 3071 lb. The car is initially at rest. Starting at t = 0, a net horizontal force Fx(t) in the +x-direction is applied to the car. The force as a function of time is given in the figure. The horizontal parts on the graph correspond to 7500 N and 3500 N.
For the time interval t = 0 to t = 4.50 s, what is the impulse applied to the car?
What is the speed of the car at t = 4.50 s?
At t = 4.50 s, the 3500-N net force is replaced by a constant net braking force Bx = -5140N. Once the braking force is first applied, how long does it take the car to stop?
How much work must be done on the car by the braking force to stop the car?
What distance does the car travel from the time the braking force is first applied until the car stops?
According to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by find out how much water it displaced. The density of gold is 19.3g/cm^3. If the crown's mass was 6.00 * 10^2g, what volume ..
He wants to row directly across a river 252 wide with a constant of 1.33 m/s. Illustrate what direction should he aim his boat, and low long will it take him to cross the river
A wooden raft has a mass of 90 kg. When empty it floats in water (density 1000 kg/m3) with 67% of its volume submerged. What mass of sand can be put on the raft without it sinking
A person pushes a 12.0kg lawn mower at constant speed with a force of 89.0N directed along the handle, which is at an angle of 45.0 to the horizontal. Calculate the horizontal friction force on the mower
A fish swimming in a horizontal plane has a velocity vi = (3.3i + 1.6j) m/s at a point in the ocean where the position relitive to a certian rock is ri = (10.5i - 3.9j) m. After the fish swims with a constant acceleration for 20.6 s, it's velocity..
the engine of a small aircraft m 1400 kg including pilot develops 180 hp. the airplanes speed is increased from 30 ms
A string is rolling several rolls about a solid sphere, and then the sphere leaved to fall from the end of the string. What is the acceleration of the center of the sphere
A curling stone with a mass of 7.00 kg moves across the ice at a speed of 1.35 m/s in the positive x direction. What is the initial kinetic energy
The two headlights of an approaching automobile are 1.5 m apart. Assume that the pupil diameter of theobserver is 4.4 mm, find At what maximum distance will this occur
What is the minimum energy that photons must have to produce 49 keV electrons in a Compton scattering? I need the answer in KeV
A cyclist intends to cycle up a hill whose vertical height is 170m.. Assuming the mass of bicycle plus cyclist is 75 kg
A nickel coin has a mass of about 5.172 g. Each mole (6.02 * 10^23 atoms) has a mass of about 57.98 g. Find the number of atoms in nickel coin. Find the number of electrons in the coin. Each nickel atom has 28 electrons/atom.
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