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Q1. From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.1 m/s.
(a) What is his average velocity v avg in the interval 2.000 min to 7.80 min?
(b) What is his average acceleration a avg in the interval 2.00 min to 7.80 min?
(c) What is v avg in time 3.00 min to 9.00 min?
(d) What is an avg in time 3.00 min to 9.00 min?
Q2. A vertical scale on a spring balance reads from 0 to 160 N. The scale has a length of 12.5cm from the 0 to 160 N reading. A fish hanging from the bottom of spring oscillates vertically at the frequency of 2.30 Hz. ignoring the mass of the spring, what is the mass m of the fish?
What is the terminal speed at which the bar falls? Imagine the bar remains horizontal and in contact with the rods at all times.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
When she gets off the ride, she uploads the scale readings to a computer and creates a graph of scale reading versus time. Note that graph has a minimum value of 519 rm N and a maximum value of 666 rm N.
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In the 1950s, an experimental train that had a mass of 2.30 x 10^4 kg was powered across a level track by a jet engine that produced the thrust of 5.30 x 10^5 N for a distance of 504 m. unless otherwise directed, suppose that air resistance is neglig..
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