Determine the speed of the truck
A baseball pitcher can throw a ball with a speed of 50 m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 20 m/s. What is the speed of the truck?
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A brass bar and aluminum bar are each attached to opposite immovable walls in-line with one another. At 28-degrees C, the air gap between the bars is 1.3 X 10^-3 m. At what temperature will the gap be closed?
Pilots can be tested for the stresses of flying high speed jets in a whirling "human centrifuge," Which takes 1.0 min to turn through 20 complete revolutions before reaching its final speed. (a) What was its angular acceleration (assumed constant
three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 = 65.0 N. If m1 = 12.0 kg, m2 = 24.0 kg, and m3 = 31.0 kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T1, a
An electron is released from Point B and a second electron is released from Point C. What can you say about the electric forces experienced by these electrons the instant they are released?
A model airplane with mass of 0.754 kg is tethered by a wire so that it flies in a circle 29.5 m in radius. The airplane engine provides a net thrust of 0.796 N perpendicular to the tethering wire. Find the torque the net thrust produces about the
When jumping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. (a) What was the takeoff speed for such a leap? (b) What horizontal distance did the froghopp
How much time does it take for the bike to come to rest? (b) What is the anguar acceleration (in rad/s2) of each wheel?
A 5.0 kg box moving at 4.0 m/s on a horizontal, frictionless surface runs into a light spring of force constant 65 N/cm. Use the work-energy theorem to find the maximum compression of the spring.
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