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Observe the trajectory of a ball tossed vertically into the air with a goal of height and caught at the same height from which it was tossed. What biomechanical principles do you observe and how do they contribute to the goal of the motion?
our sun is 2.3 x 104 ly light-years from the center of our milky way galaxy and is moving in a circle around that
Calculate the centripetal force exerted on the Earth by the Sun. Assume that the period of revolution for the Earth is 365.25 days, the average distance is (1.5 x 10^24)kg
A 1 490-kg automobile has a wheel base (the distance between the axles) of 3.20 m. Find the force exerted by the ground on each wheel
A bodybuilder configures a leg-press apparatus to a resistance of230 lb (about 1000N). She pushes the weight to her full extensionand comes to rest. A). What is her normal force on each of her feet
A skier moving at 4.60 m/s encounters a long, rough horizontal patch of snow having coefficient of kinetic friction 0.220 with her skis. Find how far does she travel on this patch before stopping
What is the spring constant (k) of the bungee cord.At what time will the object be moving with a speed of 15 m/s.
A nickel has a mass of about 5 grams. If all of this mass could be converted to energy, how many Hiroshima sized bombs would this be
a car weighs 2415 pounds and the rocket mounted on the car provides 1500 lbs of constant thrust. calculate the distance in feet traveled in this time
A 50 m3 insulated chamber containing air at 40oC, 100 kPa, R.H. 20%, is connected to another 50 m3 insulated chamber containing air at 20oC, 100 kPa, R.H. 100%. The valve is opened and the system is allowed to reach thermal equilibrium. Determine the..
An Olympic diver performs a dive from the 10m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger is the diver’s speed than the diver would have achieved by performin..
a tired and overloaded student is attempting to hold a large physics textbook wedged under his arm. the textbook has a
A long cylindrical wire of radius R carries a current I. Let the z axis be a long the axis of the wire. The current density of the wire is j=1/pir^2. Find the current within the cross section of the wire or radius r
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