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Q1. A parachutist descending at a speed of -13.0 m/s loses a shoe at the altitude of 54.0 m.
(a) when does the shoe reach ground?
(b) What is the velocity of the shoe just before it hits the ground?
Q2. An object whose weight is 100 Ibf experiences a decrease in kinetic energy of 500 ft. Ibf and an increase in potential energy of 1600 ft. Ibf. The initial velocity and elevation of the object, each relative to surface of the earth, are 50 ft/s and 40 ft, respectively. If g= 36.2 ft/s^2, conclude
(a) final velocity, in ft/s
(b) final elevation, in ft.
A 20 wood ball hangs from a 1-long wire. The highest tension the wire can withstand without breaking is 600. A 0.90 projectile travelling horizontally hits and embeds itself in the wood ball. What is the largest speed this projectile can have with..
An aircraft takes off at 203 km/h after accelerating from rest at 2.14 m/s2. What is the minimum runway length required
Over a year's time, a person receives a biologically equivalent dose of 21 mrem (millirems) from cosmic rays, What is the person's absorbed dose in rads
You throw a ball straight into the air from a height of 4 feet and with a speed of 5.02 m/s, How far are you from the ball, the moment it hits the ground
Two parallel conductive plates of area 0.3m^2 hold equal but opposite charges of magnitude 30uC on either side. find the electric force acting on am electron between the plates
A 200g block is suspended from a vertical spring, causing the spring to strech by 20 cm, What is the speed of the block when it is 5.0cm above the equilibrium position
A jet plane lands with a speed of 114 m/s and can accelerate at a maximum rate of ?4.20 m/s2 as it comes to rest. what is the minimum time needed before it can come to rest
One beam so protons is moving with a speed close to speed of light, inside a magnetic field with a strength of 12T on z-direction. Calculate the magnetic force in vectorial form
Sue and Sean are pushing on opposite sides of a 5.0kg box which is on a frictionless surface. What is Sean's force if the box accelerates away from Sue at 2.0m/s^2
A car of mass 1500 kg traveling at 24 m/s is at the foot of a hill that rises 115 m in 2.2 km. Find the average power delivered by the car's engine
Two objects are connected by a light string that passes over a frictionless pulley, Find the magnitude of the accelerations of the objects
A 75g lead sinker at 90 degrees celsius is placed in 500 cm^3 of water at 20 degrees celsius. What is the final temperature of the sinker
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