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A light string can support a stationary hanging load of 24.0 kilogram before breaking. A 2.60 kilogram object attached to the string rotates on a horizontal, frictionless table in a circle of radius 0.800 meter, while the other end of the string is held fixed. Find what range of speeds can the object have before the string breaks?
A 40.0 N crate starting at rest slides down a rough 6.0 m long ramp, inclined at 30 degrees with the horizontal. The force of friction between crate and ramp is 6.0 N. What will be the speed of the crate at the bottom of the incline?
At the end of a race a runner decelerates from a velocity of 8.00 m/s at a rate of 0.300 m/s2. What is her final velocity
a 3-kg ball moving at 11 ms collides elastically and head-on with a second 20-kg ball moving in the opposite direction
During a test, a NATO surveillance radar system, operating at 12 GHz at 155 kW of power, The aircraft reflects radar waves as though it has a cross-sectional area of only 0.22 m2. What is the power of the aircraft's reflection
A spaceship approaching a planet at a speed of 0.20c fires a probe toward a planet. Observers on the planet see the probe approaching at a speed of 0.61c. What the speed of the probe is as gauged from the spaceship?
An extreme skier, starting from rest, coasts down a mountain thatmakes an angle of 39.3 ° with the horizontal. How fast is she going just before she lands
Objective questions based on work, energy, power.
A ball thrown into the air lands on the same horizontal level, 31 m away, and 2.6 s later. Find the magnitude of the initial velocity
The minute hand of the Official Quiz Clock points to the 12 and is functioning normally until the quiz begins, How much quiz time do the students lose
A turbine in an electric power plant rotates at 3600 rpm. Discover its angular speed in radians/second, and decide the linear speed of a point 72cm from the axis of rotation. The power plant shuts down, and the turbine coast to a halt in 590s. If the..
A bumper car with mass m1 = 116 kg is moving to the right with a velocity of v1 = 5 m/s. A second bumper car with mass m2 = 96 kg is moving to the left with a velocity of v2 = -3.8 m/s. The two cars have an elastic collision. Suppose the surface is f..
a chair of weight 140 n lies atop a horizontal floor the floor is not frictionless. you push on the chair with a force
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