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A cannon tilted up at a 30.0 angle fires a cannon ball at 70.0 m/s from atop a 30.0m -high fortress wall. What is the ball's impact speed on the ground below?
how long must the engine burn in order to reach this speed. What will be the equilibrium temperature when a 259 block of copper at 258 is placed in a 137 aluminum calorimeter cup containing 836 of water at 16.
An Escort and a Camaro traveling at right angles collide and stick together. What was the speed of the Camaro
You drop a 14g ball from a height of 1.5 m and it only bounces back a height of 0.85m. What is the total impulse on the ball when it hit the floor
A rifle with a weight of 35 N fires a 3.0-g bullet with a speed of 230 m/s. Find the recoil speed of the rifle
A 5.43 kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. find the speed of the block at the equilibrium position of the spring
A disc spins at 20 [rpm]. Calculate the period of rotation (which is the time interval required for 1 revolution)
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable above the worker
An object moves with constant acceleration 3.30 m/s2 and over a time interval reaches a final velocity of 10.4 m/s. If its initial velocity is 5.2 m/s, what is its displacement during the time interval
Determine the number of moles of helium in the balloon and Determine the mass of helium needed to inflate the balloon to these values
q1. a 19 kg box slides 4.0 rm m down the frictionless ramp shown in the figure then collides with a spring whose
A 4.9-N hammer head is stopped from an initial downward velocity of 3.2 m/s in a distance of 0.45 cm by a nail in a pine board. Calculate the downward force F exerted by the hammer head on the nail while the hammer head is in contact with the nail a..
A source of sound waves of frequency 0.4 kHz is stationary. What is the observed frequency if the observer moves toward the source
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