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Q1. A ball in flight is recorded and analyzed using digital video analysis software. The analysis produced the result that the ball had a horizontal speed of 0.60 m/s. In the analysis, a stick was used as a calibration standard, and it was believed that the stick was 1.0 m long. Yet, after the analysis was completed, it was discovered that the stick was actually 0.90 m long.
Was the horizontal speed actually faster or slower than analysis result?
What must be the result have been for the horizontal speed (Vx)?
Q2. A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.What is the frequency heard by the observer? suppose the speed of sound in air to be 340 m/s.
Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.
How fast is the roller coaster moving at the top of the loop
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A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
Discover the horizontal and vertical displacement
One displacement vector A has magnitude of 2.78 km and point due north. Another displacement vector B has a magnitude of 7.40 km and also points due north. Provide diagrams and calculate the magnitude and direction of A+B, B-A, A-B.
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A diver 40 m deep in 10 degree Celcius fresh water exhales a 0.50-cm-diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 degrees Celcius? Assume that the air bubble is always in..
What happens in the table as to the potential energies
What is the magnitude of an average acceleration of the ball
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