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A basketball player makes a shut from the free-throw line at a horizontal distance of 4.3 m away from the hoop. The hoop is suspended 3.1 m above the ground, and the bull leaves the player's hands 2.2 m above the ground. With a good stopwatch, you determine that it takes the ball 0.55 s to reach the top of its trajectory, and another 0.36 s lo go through the hoop. You have no information about the angle or velocity of the ball, but you decide to make some calculations. Ignore air drag, and assume constant gravitational acceleration equal to 9.8 m / s2. Which choice best represents the speed of the ball when it is at the top of ils trajectory?
Determine the terminal velocity of a spherical bacterium (diameter 2.00 meter) falling in water. You will first need to note that the drag force is equal to the weight at terminal velocity
A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. Suppose a pul..
80.0 kg student sits down in his 920 kg car, and his weight causes the causes the car's springs to sink an additional 4.0 x 10-3 m. Calculate the frequency for the vertical vibration
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.2 m/s and the tension in the rope is T = 19.7 N. 5) Return to the original ..
The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What seems to be the primary safety concern in the lab
A 10kg box slides 4.0 m down the frictionless ramp then collides by a spring whose spring constant is 250 N/m. (4m is the length of the ramp not the height) What is the maximum compression of the spring? At what compression of the spring does the box..
A wide rectangular channel discharges 1.6 m3/sec per unit width. The slope is 0.001 and the manning's coefficient is 0.015. At a certain point the water depth is 0.75m. How far downstream will it be 0.73m. Use V.T.
Suppose a modified Joule's apparatus contains 2.8 kg of water. instead of the ropes having weights on the end, the apparatus is turned by exerting a constant horizontal force of 40 N on a heavy cord wrapped around the axle.
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -26.0 nC?
A proton (q = 1.60×10?19C , m = 1.67×10?27kg)moves in a uniform magnetic fieldB? =( 0.490T )i^. What is the magnitude of the magnetic force acting on the proton
Two charges of equal magnitude exert an attractive force of 4.5 x 10-4 N on each other. If the magnitude of each charge is +1.8 mu C, How far apart are the charges
A 1300-{rm kg} car rolling on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.7 m. Illustrate what is the spring stiffness constant of the spring?
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