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Your adventurous friend Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. Her bungee cord has an un-stretched length of 50 m and a spring contsant of k= 600 N/m. Lola has a mass of 55 kg.
a) How fast is she falling when she just starts to stretch the cord?
b) How long does it take for Lola to reach this point?
c) What is her height above the river at her lowest point?
d) What type of mechanical energy system does Lola and the cord have before she jump? At the instant Lola comes to rest at her lowest point?
Calculate the magnetic field at the observation location. The space shuttle releases a satellite into the circular orbit 565 above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs.
The outer edge of the grooved area of a long-playing record is at a radial distance 36 cm from the center; the inner edge is at a radial distance of 15 cm. What is the radial speed of the needle
A barge of mass 5.0 104 kg is pulled along the Erie Canal by two mules, How much work is done on the barge by both of these mules together as they pull the barge 150 m along the canal
The time constant of an RL circuit with L = 25 mH is five times the time constant of an RC circuit with C = 40 µF. What is the time constant of the RL circuit
A skier with a mass of 59 kg starts from rest and skis down an icy (frictionless) slope that has a length of 44 m at an angle of 32° with respect to the horizontal.
you accelerate your car starting from rest. while the car is increasing its speed, the frictional force acting from the road on the tires? A) directed backword, opposing the motion B)IS directed vertically uo, C) is directed forward, in the direct..
The radius of curvature of a convex mirror is 1.60 x 10^2 cm. An object that is 14.0 cm high is placed 40.0 cm in front of this mirror. Find out (1) the location and (2) the height of the image.
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20kg
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up
A block-spring system oscillates with amplitude of 3.70 cm. The spring constant is 250 N/m and the mass of the block is 0.500 kg.
What is the rms speed of the molecules in low-density hydrogen gas at 0 ^circ {rm C}? (The mass of a hydrogen molecule, rm{H_2} , is 3.32×10-27 kg ).
Two parallel plates, each of area 8.17 cm2, are separated by 6.20 mm, Calculate the amount of the electric charge stored on each plate
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