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A ball is thrown straight up in the air with a velocity of 40 m/s. What is the speed of the ball right before it hits the ground? (neglecting air resistance) How long will the ball be in the air? How high will the ball go? After 6 s, what is the position of the ball? (above the ground) After 6 s, what is the velocity of the ball? (assume up is the positive direction) After 6 s, what is the acceleration of the ball? (assume up is the positive direction)
Light enters a substance from air at 30 degrees to the normal. It continues through the substance at 23 degrees to the normal. What would be the critical angle for this substance
A 200 gram object moves horizontally and slams into a 500 gramobject connected to a 1 meter long massless string. find the period of oscillation of the conglomerate object
A pitched baseball of mass .200kg, arives at home plate with a speed of 40m/s and is batted straight back to the picture, determine the work done by the bat on the ball
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. The aluminum and water are initially at a temperature of 19.5, and are ..
A dragster starts from rest and accelerates down a track. Each tire has a radius of 0.320 m and rolls without slipping. At a distance of 408 m, determine the linear speed of the dragster
A tennis ball of mass m = 0.070 kg and speed v = 25 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45°
A small object with a mass of 380 mg carries a charge of 35.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 12.0° with the vertical, ..
A car accelerates from rest to a speed of 19.0m/s in 6.00 seconds. If the car weighs 16000N, what average power must the motor produce to cause this acceleration
During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires, How long does the car take to stop completely in seconds
A 50 gallon buoy is tied to the bottom of a still lake by a rope. 26% of its volume is below water. What is the buoyant force on the buoy
two flexible balls rolling along a frictionless horizontal surface collide with each other. the larger of the balls
question a projectile is launched from a platform 35 feet high with an initial velocity of 20 feet per second. the
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