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Q. An airplane reaches a velocity of 71.0m/s when it takes off. What is should its acceleration be if the runway is 1-km long?
Q. A 159 kg rocket moving radially outward from Earth has a speed of 8.56 km/s when its engine shuts off 198 km above Earth's surface
a. Avoid air resistance. Find out rocket's kinetic energy when the rocket is 298 km above Earth's surface
b. What is the max height that the rocket reaches?
A car drives straight off the edge of a cliff that is 58 m high. The police at scene of the accident observed that the point of impact is 121m from the base of cliff. How fast was the car traveling when it went over the cliff.
A stone is thrown at a bell with the speed of 20m/s. The stone strikes the bell and the sound is heard 2.60 s after the stone was released. Speed of sound is 342m/s, how far is the boy from bell.
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
suppose that visible light enters a Plexiglas cube containing water at a 20o angle of incidence, travels through the water and exits the cube.
The electric field in a region of space is oriented along the positive y axis. A circle of radius R is placed in xz-plane. The flux of the electric field by this circle is Φ. The same electric field passing through a second circle of radius 2R parall..
In coming to a stop, a car leaves skid marks 82m long on the highway. Assuming a deceleration of 6m/s2, estimate the speed of the car just before braking.
Find out the normal force exerted on the crate by the elevator.
compute the distance from the central maximum to the first bright region on either side of the central maximum.
What is the magnitude of the vertical component of its velocity as it strikes the ground.
A 10 ball of clay traveling east at 9 collides and sticks together with a 40 ball of clay traveling north at 6.5. What is the speed of the ball of clay.
A civil engineer wishes to plan a curved exit ramp for a highway in a way that a car will not have to rely on friction to round the curve without skidding. In the other words, a car moving at the designated speed can negotiate the curve even while th..
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