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A car starts from rest and travels for 7.0 seconds with auniform acceleration of +2.5 m/s^2. The driver then applies thebrakes, causing a uniform acceleration of -3.0 m/s^2. If the brakesare applied for 2.0 seconds, how fast is the car going at the endof the braking period, and how far has it gone?
Find the focal length of a concave mirror if an object 12cm from the mirror has a virtual image 2.1 times the object's actual size
Calculate the acceleration of the arrow in the bow.
At a grinding wheel has an angular velocity of 27.0 rad/s . It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 1.70 s. What was the acceleration as it slowed down
A coin with a diameter of 3 cm is dropped onto a horizontal surface. The coin starts out with an initial angular speed of 27.8 rad/s, How far does the coin roll before coming to rest
A tennis ball initially moves with a velocity of 26.0 m/s horizontally to the right. A tennis racket strikes the ball, giving it a velocity of 26.0 m/s to the left. Find the initial velocity of the racket
The mass of Venus is 80% that of Earth while its radius is 95% that of Earth. What is the value of the acceleration due to gravity on Venus
A thin rod of length 0.75 m and mass 0.35 kg is suspended freely from one end. It is pulled to one side and then allowed to swing like a pendulum, Find the rod's kinetic energy at its lowest position
Suppose an oxygen molecule traveling at a velocity of 480m/s bounces back and forth between opposite sides of a cubical vessel 0.19 on a side. What is the average force per unit area
The pressure gauge on a tank registers the gauge pressure, which isthe difference between the interior and exterior pressure. When thetank is full of oxygen (O2), it contains 15.0 kg of the gas at a gauge pressure of 35.0 atm.
Ball 1, with a mass of 130g and traveling at 14m/s, collides head on with ball 2, What are the final velocities of each ball if the collision is perfectly elastic
The aorta carries blood away from the heart at a speed of about 40 cm/s and has a radius of approximately 1.1 cm. find the approximate number of capillaries in the human body
When its coil rotates at a frequency of 258 Hz, a certain generator has a peak emf of 72 V. What is the peak emf of the generator
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