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A tree falls on a bicycle path 40 m ahead of a cyclist traveling at 16 m/s. The cyclist instantly slams on her brakes. If the bike and the rider have a combined mass of 100 kg and her brakes cause a net force of 440 N, how far from the fallen tree will she be when she stops?
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
A mountain climber jumps a 3.0m wide crevasse by leaping horizontally with the speed of 8.00 m/s. If the climber's direction of motion on landing is 45 degrees, what is height difference between the two sides of the crevasse? Where does the climbe..
A system consists of two positive point charges, q1 and q2>q1. The total charge of the system is +62.0 x 10^-6 C, Find q1 and q2
A uniform magnetic field of magnitude B= 1.2 teslas is directed toward the bottom of the page in the -y direction as shown above. At time t=0, a proton p in field is moving in the plane of the page with a speed v0= 4 x 10^7 meters per second in a ..
The speed of a passenger train is 16mph faster than the speed of a frieght train. The passenger train travels 330 miles in the same time it takes the frieght train to travel 250miles. find the speed of each train.
What force (magnitude) does the spring exert on the object while it is a distance 2.90×10-2 below equilibrium position, moving upward.
if a 2.5 kg ball puts 118 joules of energy in a spring with a 614 n/m constant, how far is the spring compressed.
A solid weighs 300N. Calculate the pressure exerted by the solid when it is kept on a glass surface, if the area of contact is 700cm2 . solve the numerical.
A block of mass 16.7 kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 4.89 m/s2. a) What is the tension in the cable? b) What is the magnitude of the net force acting o..
A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas.
The rocket fires for 10 mins , after that the asteroid is moving at 30 degrees to its original path at the speed of 18 km/h/ Find its average acceleration.
A light bulb emits light uniformly in all directions. The average emitted power is 150.0 W. At a distance of 4.50 m from the bulb, find out (a) the average intensity of the light, (b) the rms value of the electric field, and (c) the peak value of t..
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