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Q. A certain freely falling object requires 1.6s to travel the last 38.00m before it hits the ground. From what height above the ground did it fall?
Q. The driver of a car is initially moving at a constant speed of 70.40 km/h when a traffic light turns red. If a 0.535s reaction time is required before the brakes can be applied, what is the distance in meters travelled by the car before it begins to slow down?
What focal length does the lens need. how many meters will the car have moved before it begins to slow down.
The platter of a computer hard drive disk rotates at 5400rpm.
What minimum constant acceleration does this need if the aircraft is to be airborne after a takeoff run of 250 m.
A person carries a long pole of mass 20 kg and length 3.4 m at the angle of 60 degrees. Find the magnitude of the torque on the pole due to gravity.
The springs of a 1300 {rm kg} car compress 6.0 {rm mm} when its 62 {rm kg} driver gets into the driver's seat. If the car goes over a bump, what would be the frequency of vibrations.
A 3500 kg block falls vertically through 5 m and then collides with a 400 kg pile, driving it 3.0 cm into bedrock. Assuming that the block-pile collision is completely inelastic, find out the magnitude of the average force on the pile from the bed..
use the inverse square law to display that in space shuttle territory, 200 kilometers above earth's surface, the force of gravity on a shuttle is about 94 percent of that at earth's surface.
A series ac circuit is shown. The inductor has a reactance of 80 Omega and an inductance of 200 mH. A 90- Omega resistor and a capacitor whose reactance is 130 Omega , are also in circuit. The rms current in the circuit is 1.3A. What is the phase ..
Find the electric field at the position of the electron. What is the potential difference in volts between the plates.
A firefighter at a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as shown in Figure. If the initial speed of the stream is vi. At what height h does the water strike the building?
Approximately how many atoms make up our planet? For simplicity, suppose the average atomic mass of the atoms is 14 . Avogadro's number gives the number of atoms in a mole.
A 220 g air-track glider is attached to a spring. The glider is pushed in 12cm against the spring, and then released. A student with a stopwatch finds that 16 oscillations take 11.5.
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