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Q. A man weighing 670 and a woman weighing 400 have the same momentum. What is the ratio of the man's kinetic energy to that of the woman?
Q. A student walks 24 m from her math class and then turns 90° and walks 10 m to her locker, which is directly north of her class. What is her total displacement?
Discuss briefly centripetal acceleration, the speed and the force exerted by a ball attached to a string.
A spaceship is coming directly toward you while you are in the international space station. You are told that the spaceship is shining sodium light. You have an apparatus that and resolve two closely spaced wavelengths if the difference is 0.55 nm. I..
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.7 m/s2, what is a force exerted by the scale.
A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are vertical to the book and are horizontal.
A helicopter is ascending perpendicularly with a speed of 5.42 m/s. At a height of 146 m above the Earth, a package is dropped from a window. How much time does it take for package to reach the ground.
What are speed and direction of the ball after the collision
A 150g ball and a 250g ball are connected by a 34cm long, massless, rigid rod. The balls rotate about their center of mass at 130 . what is the speed of ball of 150 g.
An astronaut on the Mars attaches a small brass ball to a 1.00- length of string and makes a simple pendulum. She times 13 complete swings in a time of 35.4 seconds. From this measurement she calculates the acceleration due to gravity on the Mars.
The gravitational force between two masses M and m separated by a distance r is 40 N. What is the new force when this distance is halved?
An ocean liner leaves New York City and travels 21° north of east for 134km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
A particle has an acceleration of 6.39 for 0.28. At the end of this time the particle's velocity is 9.31 .What was the particle's initial velocity.
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