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Q1. Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which is true about their kinetic energies as they reach the ground?
Q2. A deuteron is accelerated from rest through a 10-kV potential difference and then moves perpendicularly to a uniform magnetic field with B = 1.7 T. What is the radius of resulting circular path? (Deuteron- m = 3.3 x 10-27 kg, q = 1.6 x 10-19 C)
A 200-N beam is held horizontally by a vertical steel cable at each end. The beam is 18 m long. A 650-N box sits 3.0 m from the left end. What is the tension in the right cable
A soccer playrer kicks a 0.5kg ball from rest to a speed of 9m/s during a 0.15s contact between his foot and the ball. What is the average force applied by the players foot during the kick
Suppose we take a 1 m long uniform bar and support it at the 23 cm mark. Hanging a 0.36 kg mass on the short end of the beam results in the system being in balance
How long after the first strike does Wilma hears the sound. What is the time interval between successive sound pulses she hears.
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
The gravitational force exerted on a baseball is 2.11 N down. A pitcher throws the ball horizontally with velocity 15.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 174 ms. The ball starts from rest.
At what speed do a bicycle and its rider, with a combined mass of 100-kg, have the equal momentum as a 1500 kg car travelling at 5 ;{ rm m}/ {rm s}.
A football player who weighs 85 kg is carrying the ball directly up field at a rate of 15 km/hr. What is the initial momentum of the offensive player
A 50 newton horizontal force pushes a 10 kg mass sitting on a horizontal surface. What is the acceleration of the mass
You stand on a frictional platform that is rotating at 1.9 rev/s. Your arms are outstretched, and you hold a heavy weight in each hand. What is the resulting angular speed of the platform
A block of mass m is initially at rest at the top of an inclined plane with a height = 6 m which makes and angle of ? = 25 degrees with respect to the horizontal. What is the speed of the block as it leaves the ramp
A mountain climber wears a goose down jacket 3.3cm thick with total surface area 1.2m^2 . The temperature at the surface of the clothing is -20C and at the skin is 34 C. Determine the rate of heat flow by conduction through the jacket
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