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A car traveling 5m/s slams on its brakes, creating an acceleration of -2 m/s2. How far did the car travel after it applied its brakes?
A curve of radius 72 is banked for a design speed of 120 .If the coefficient of static friction is 0.35 (wet pavement), at what range of speeds can a car safely handle the curve?
It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0 m/s, how many b
(a) If the speed of the pot as it passes Jill's window is 52.0 m/s, what was its speed when Jack saw it go by? (b) What is the height between the two window ledges?
A 18.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 84.5 N and is directed at an angle of 30.0° above the horizontal. Determin
The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 190 N. Find the length of the spring in this situation.
He finds that the acceleration due to gravity is constant at 0.8 m/s2.
The space shuttle is the most complex machine ever built and the first orbital spacecraft designed for partial reusability. It has a mass of 2,209,203 kg and is capable of taking up to 11 astronaunt
An observer in S' moving along x axis at speed v relative to S also observes two flashes, but the blue flash occurs 6μs before the red. What is the magnitude and direction of v?
A 70 kg. skydiver reaches a teminal velocity of 50 m/s. At what rate is the drag force dissipating his kinetic energy? How does this rate compare with his rate of change in potential energy?
Two source points S1 and S2 are emitting waves with wavelength .5m they are 1.75m apart. If a sound detector was to circle around the midpoint of the two sources, how many points are exactly in phas
a) Find the speed of the rock when it reaches the lowest point of its trajectory? b) What is the maximum tension in the string?
A roller coaster car starts with a speed of 12 m/s at point A (30 meters above the horizontal surface), travels down a hill and levels out at point B (15 meters above the horizonta surface), then tr
Muscles are attached to bones by elastic bundles called tendons. For small stretches, tendons can be modeled as springs obeying Hooke's law. Experiments on the Achilles tendon found that it stretche
An object of mass 10.0 kg is initially at rest. A 100 N force causes it to move horizontally through a distance of 6.00 m. What is the change in the kinetic energy of this object?
The liquid-drop model of the nucleus suggests that high-energy oscillations of certain nuclei can split ("fission") a large nucleus into two unequal fragments plus a few neutrons.
The tension in the rope is 40 N, and the coeffient of friction between the block and the surface is mu k = 0.25. a). If the block travels a distance of 4.5 m. along the surface, what is the work done
In an experiment, an inclined plane is set up. A 200 g mass is placed on a car, and the car is placed at the bottom of the inclined plane. The object is to find the correct hanging weight that will
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.12 mT. If the speed of the electron is 1.51 x 107 m/s, determine the following. The time interval
The astronaut's seat is inclined to stay perpendicular to his apparent weight. Calculate the centrifuge's rotational speed v. Answer in units of m/s.
The acceleration of gravity is 9.8m/s^2. Determine the magnitude of the acceleration of the 8.22 kg block. Answer in units of m/s^2.
Determine the difference in potential between two points that are distances R_a and R_b from a very long (\gg R_a or R_b) straight wire carrying a uniform charge per unit length lambda.
The tackler holds onto the receiver, and the two move off together with a velocity of +1.8 m/s. The mass of the tackler is 130 kg. Assuming that momentum is conserved, find the mass of the receiver.
A car (mass = 1190 kg) is traveling at 44 m/s when it collides head-on with a sport utility vehicle (mass = 2550 kg) traveling in the opposite direction. In the collision, the two vehicles come to a
Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them.