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A driver traveling at 72 km/hr sees an animal dash out onto the road and slams on the brakes. Accelerating at ?6 m/s2, the car stops just in time 45 m down the road. What was the driver's reaction time (i.e., the time that elapsed before she engaged the brake)?
A 91kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m.What is the net force exerted on the skier, suppose his acceleration is constant.
The potential equals 400 V at 1.00 m from a very large, flat dielectric sheet that carries a surface charge density of -1.00 x 10^-8 C/m2
A Garden hose with a cross sectional area of 3.2x10^-4 m^2 is used to fill up a bucket with a volume of 6.5x10^-2 m^3 in 25 seconds
The cars stick together and move as a unit after the collision, at an angle of 47.0° north of east and at a speed of 6.36 m/s. Find out the speed of the 3000 kg car before the collision.
Jane and John, with masses of 51 kg and 66 kg, correspondingly, stand on a frictionless surface 13m apart. John pulls on a rope that connects him to Jane, giving Jane an acceleration of 0.9m/s2 toward him.
A 53.0-kg person jumps from rest from the top of a 10.0-m-high tower straight down into the water. Determine the magnitude of the average force that the water exerts on the diver
a 28 kg rifle bullet at an unknown velocity buries itself in a 3.6-kg pendulum hanging on a 2.8-m long string, what was the speed of the bullet prior to impact
irplane A , starting from rest with constant acceleration, requires a runway 600m long to become airborne. How long must the runway be for airplane B
What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.4 times that of the amplitude of either of the combining waves? Exp..
A series RCL circuit has a resonant frequency of 750 kHz, what is the value of the inductance?
Each is afraid that one vine will break; as a result they grab each other and hang on. They swing upward together, reaching a point where the vines make an angle of 22.1° with the vertical. Find the value of the ratio m/M.
A spherical shell of copper with an outer diameter of 19.0 cm floats on fresh water with one third its volume above the water's surface
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