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A grenade is accidentally dropped with a soldier will scaling a 55.0-m high cliff.
a) How long will it take the grenade to fall to the ground (ignoring air resistance)?
b) How fast is the grenade be travelling?
At t=0 a grinding wheel has an angular velocity of 25 rad/s. It has a constant angular acceleration of 35.0 rad/s^2 until a circuit breaker trips at time t = 2.10 s. From then on, it turns by an angle 431 rad as it coasts to a stop at constant ang..
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. If the U.S. burns 200 million of gallons of gasoline every year, how many billions of lbs of CO2 are emitted every year?
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 290 ? rad/s. One such flywheel is a solid, uniform cylinder with a mass of 390 kg and a radius of 1.06 m. (a) What is..
A very long cylinder with radius 5.54 cm has a uniform density of charges throughout it. If the charge density in the cylinder is 1,304 nC/m3 (nanoCoulombs per cubic meter). Inside the cylinder, for distances x (less than the radius) from the cent..
A 54 kilogram pole vaulted running at13 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. calculate her altitude as she crosses the bar
As you ride your 14-kg bicycle on level ground you do some work against a 30N force of air resistance if your mass is 65-kg.What is power you apply to maintain a velocity of 25-km`.a-on level ground b-going up a 5degrees slope?(remember it's a num..
Anita and Nick are playing tug-of-war near a mud puddle. They are each holding on to an end of a taut rope that has a knot exactly in the middle. What is the location of the knot relative to the center of the puddle
You drive at 65 mi/h towards the east for 2 hours and then turn towards the north and drive at 56mi/h for 1 hour. find the average speed and average velocity
A copper pipe with an outer radius of 0.016 m runs from an outdoor wall faucet into the interior of a house. The temperature of the faucet is 2.1°C, Find the inner radius of the pipe
In 1910 Rutherford performed a classic experiment in which he directed a beam of alpha particles at a thin gold foil. He unexpectedly observed a few of the particles scattered almost directly backward.
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
A place kicker must kick a football from a point 36 m from the goal. As a result of the kick the ball must clear the crossbar, which is 3.05 m high. Find its height with respect to the crossbar
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