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Q. The radius of Earth is about 6.38 multiplied by 10^3 km. A 7.02 multiplied by 10^3 N spacecraft travels away from Earth. What is the weight of spacecraft at the following distances from Earth's surface: 6.38 times 10^3 km and 1.4 times 10^4 km?
Q. A jet plane lands with a velocity of +103m/s and can accelerate at a maximum rate of -5.02 m/s2 as it comes to rest. From instant it touches the runway, what is the minimum time needed before it can come to rest?
Find out an average acceleration of the motorcycle
An antitank weapon fires a 3.00 kg rocket which acquires a speed of 50m/s after travelling 90cm down a launching tube. Assume the rocket was accelerated uniformly, what force acted on it.
What was the final temperature of the coins. What is the train's acceleration after its wheel begins to stick.
If the bullet has a mass of 21.5 and a speed of 310 , how high would the block rise into the air after the bullet becomes embedded in it.
Co-60 is often used as a radiation source in medicine. It has a half-life of 5.25 years. How long, after a new sample is delivered, would the activity have decreased to about 1/3 its original value.
A tow truck pulls a car 5.2 km along a horizontal roadway using a cable having a tension of 790.
The rms speed of the molecules in 1.8 of hydrogen gas is 1600 m/s. What is total translational kinetic energy of the gas molecules.
Calculate the x-component of vector. A uniform electric field of magnitude 375 N/C pointing in the positive x-direction acts on an electron, which is initially at rest.
On a frictionless table, a glob of clay of mass 0.340kg strikes a bar of mass 1.44kg perpendicularly at a point 0.10m from the center of the bar and sticks to it.
Two mirrors meet at a 127° angle. If light rays strike one mirror at 40° as shown, at what angle ? do they leave the second mirror.
A 1300 N uniform boom is supported by a cable perpendicular to boom. The boom is hinged at the bottom, and a 2100N weight hangs from its top.
If the perceived frequency becomes constant at 440 Hz, what is terminal speed at the paratrooper? Take the speed sound in air to be 343 m/s and assume the paratrooper always remains below the helicopter.
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