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The speed of a bobsled is increasing, because it has an acceleration of 2.99 m/s2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 597 N. The mass of the bobsled and its riders is 346 kg.
(a) What is the magnitude of the force propelling the bobsled forward?
(b) What is the magnitude of the net force that acts on the bobsled?
Tarzan, King of the Jungle (mass = 70.4 kg), grabs a vine hanging from a tree branch. He is 4.80m off the ground when he grabs the vine. How high will Tarzan and Jane swing
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.877 rad/s. You, with a mass of 70.5 kg, compute the total angular momentum of the system
The primary coil of a transformer has N1 = 2.00 102 turns, and its secondary coil has N2 = 6.67 101 turns. what rms voltage is developed across the secondary coil
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. a) how much of this charge is on the inner surface of the car? b) how much is on the outer surface of the car?
When an electron in a hydrogen atom falls from a higher energy state down to the ground state, What is the quantum number of the level from which the electron fell
A standing observer perceives a train whistle to have a frequency of 300 Hz. what is the frequency of the sound waves emitted from the train
A convex mirror has a focal length of -39.0 cm. A 12.0 cm tall object is located 41.0 cm in front of this mirror. Using a ray diagram drawn to scale, determine the size of the image
Two masses traveling at the same speed v0 collide head on. Nothing is known about collision other than that it is not completely inelastic.
q1. the current in a coil changes from 3.80 a to 1.90 a in the same direction in 0.510 s. if the average emf induced in
Suppose the amount of heat added to the ice block is doubled. By what factor must the mass of the ice be increased if the system is to have the same final temperature
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
At t = 0 a grinding wheel has an angular velocity of 21.00 rad/s. It has a constant angular acceleration of 21 rad/s^2 until a circuit breaker trips at 2.40s. From then on it turns during 344 rad as it coasts to a stop at constant acceleration.
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