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Q. A cargo plane is flying horizontally at an altitude of 11.4 km with a speed of 960 km/h when a large crate falls out of the rear loading ramp. (Ignore any effects due to air resistance.)
(a) How long does it take the crate to hit the ground?
(b) How far horizontally is the crate from the point where it fell off when it hits the ground?
(c) How far is the crate from the aircraft when the crate hits the ground, assuming that the plane continues to fly with the same velocity?
An 1150-kg car pulls a 450-kg trailer. The car exerts a horizontal force of 3,800 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.15 for the trailer.
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
An ocean liner leaves New York City and travels 12.0° north of east for 111 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the directions.
Two parallel plates, each with an area of 110, are given equal and opposite charges of magnitude 0.18. The space between the plates is filled with the dielectric material, and the electric field within the dielectric is 0.31.
A 5.25 kg ball of clay is thrown downward from a height of 2.79m with a speed of 4.41 m/s onto a spring with k=1530 N/m. The clay compresses the spring a certain maximum amount before momentarily stopping.
To test the deflection of the uniform 200-lb beam the 121-lb boy exerts a pull of 36 lb on the rope rigged. Calculate the force supported by the pin at the hinge O.
An Indy car with a speed of 120km/h goes around a level, circular track with a radius of 1km. What is centripetal acceleration of the car.
find the ambulance's speed from these observations.
A car travelling 92 {rm km/h} is 150 {rm m} behind a truck travelling 80 {rm km/h}. How long will it take the car to catch the truck.
find out the magnitude of their acceleration. If the blocks move determine the magnitude of the tension in the string. If the blocks do not move determine the sum of magnitude of the forces of friction acting on the blocks. Show all the work.
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
A simple harmonic oscillator consists of a block of mass 4.kg attached to a spring of spring constant 153 N/m. When t = 2 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
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