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A parachute dropped from a 30-m high cliff falls with a fix velocity of 1.5 m/s. Twenty two seconds later a stone is dropped from the cliff.
a. Find how long does it take the parachute to hit the ground?
b. Find how long does it take the stone to hit the ground?
c. Find which one will hit the ground first and why?
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.23 x 10^-3 g. Find the temperature inside the box
A truck rests on a bridge span whose length between support is 120 feet. Find the upward force exerted by each support pier on the bridge
A 0.99-cm-diameter microscope objective has a focal length of 2.6 mm. It is used in visible light with a wavelength of 532 nm. What is the objective's resolving power if used in air
question1a long solenoid with 70 turns of wire per centimeter carries a current of 0.16. the wire that makes up
A 2.0 kg particle P has a position vector of magnitude 3.0 m and angle ?1 = 45° and a velocity vector of magnitude 5.5 m/s and angle ?2 = 30°. The force on the particle has magnitude 4.7 N and angle ? 3 = 30°. What is the magnitude of the torque on t..
A 3.60-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 9.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position, Where does this maximum speed occur
A box is pushed across the floor, slide with a constant velocity, and is opposed by a friction force of 25N. What is the magnitude of the force? Choose the correct answer. A.Less than 25N B.Zero C.Greater than 25N D.25n
In the absence of an applied torque a rigid body with three distinct principal moments of inertia given by I1, I2 and I3 is rotating freely about a fixed point inside the body.
A system consists of 4.0 kg of water at 85 degrees Celsius 35 J of work is done on the system by stirring with a paddle wheel, whlie 69 J of heat is removed
A space station in the forf of a large wheel, 129m in diameter, rotates to provide an "artificial gravity" of 6.10 m/s^2 for people located at the outer rim.
A 68-kg skater moving initially at 2.4 m/s on rough horizontal surface comes to rest uniformly in 3.52 s due to friction. What force does friction exerts on the skater
To tighten a spark plug, it is recommended that a torque of 15.6 N·m be applied. If a mechanic tightens the spark plug with a wrench that is 24.2 cm long, what is the minimum force necessary to create the desired torque?
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