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A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 18.9 m/s directly upward. Choose upward as the positive direction in your analysis.
(a) How long does it take to reach the maximum height?
s
(b) How long does it take to reach the ground after it reaches its highest point?
(c) What is its velocity just before it hits the ground? (Indicate the direction with the sign of your answer.)
m/s
The dialectric breakdown of air is approximately 3E6 V/m. This is the electric filed required to create a spark, What is the approximate voltage on the sphere at that instant
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Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the speed of a satellite in geosynchronous orbit
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A galvanometer with a full scale sensitivity of 500 muA and a coil resistance of 54 Omh, What is the required shunt resistance
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. What is the acceleration of the crate relative to the ground
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
Three resistors, R1 = 17? , R2 = 52? , and R3=R, are connected in series with a 24.0 Vbattery, find the potential difference across each resistor
A car of mass 1203 kg collides head-on with a parked truck of mass 2000 kg. Spring mounted bumpers ensure that the collision is essentially elastic. what is the initial speed of the car
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