Physics Properties Of Matter Level: Misc Level
A force of 1.0 x 103 N is applied to a steel rod of length 1 m and a circular cross-section of area 10 cm 2. Find the elongation of the rod. Young's modulus for steel is 2.0 x10 11Pa.
Physics Force & Laws Of Motion Level: Misc Level
A 3 kg bowling ball traveling with a velocity of 3 m /s collides head -on with another bowling ball of the same mass traveling with a velocity of - 2 m /s. If the collision is perfectly elastic, the velocities of the bowling balls after the collision is:
Physics Properties Of Matter Level: Misc Level
A log of wood is floating in water with 40 % of its volume above the surface of the water.If the volume of the log is 0.4 m^3, find the mass of the log.
Physics Gravitation Level: Misc Level
A star rotates about its axis through a diameter once in 50 days. At the end of its life, the star collapses to one - hundredth of its original diameter.The rate of rotation of the collapsed star will be:
Physics Force & Laws Of Motion Level: Misc Level
A 300 g baseball traveling at 30 m /s is struck by a bat in the direction from which it came at 40 m /s. Find the impulse of the force on the baseball.
Physics Circular Motion Level: Misc Level
An angular acceleration of 1200 rev /min 2 when expressed in radians /s 2 is:
Physics Force & Laws Of Motion Level: Misc Level
A 200 g ball hits a wall perpendicularly with a velocity of 30 m/s and rebounds back perpendicularly with a velocity of 20 m /s. If the collision lasts for 5 ms, find the average force exerted by the ball on the wall.
Physics Rotational Mechanics Level: Misc Level
A uniform solid sphere of mass 5 kg and radius 30 cm is rotating about an axis through its center at the rate of 180 rev /min.Find the kinetic energy of the sphere. The rotational inertia of a uniform sphere is 2 /5 MR 2.
Physics Properties Of Matter Level: Misc Level
Water is pumped through a pipe to tank at the top of a building. The pressure of the water at ground level is 2.2 x 10 5 pa and at the tank, the pressure is atmospheric.If the diameter of the pipe is the same throughout,find the height at which the tank is located. Atmospheric pressure may be assumed as 1.0 x 10 5 Pa and g as 10 m / s 2.
Physics Properties Of Matter Level: Misc Level
Water is pumped through a pipe to tank at the top of a building. The pressure of the water at ground level is 2.2 x 10 5 pa and at the tank, the pressure is atmospheric.If the diameter of the pipe is the same throughout,find the height at which the tank is located. Atmospheric pressure may be assumed as 1.0 x 10 5 Pa and g as 10 m / s 2.
Physics Waves And Oscillations Level: Misc Level
I have an organ pipe which resonates at 100 Hz. What would be the third frequency it could resonate at if it s A) An open pipe, B) A closed pipe. C) If I have an open organ pipe which can resonate at 100 Hz. If I have a closed pipe of the same diameter, but is three times as long, what frequency will it resonate at.
Physics Waves And Oscillations Level: Misc Level
A tsunami wave can travel at 600 km/ hr in the open ocean.If the frequency of the waves is measured at 0.01667 Hz, what is the wavelengths of a tidal wave in the ocean.
Physics Force & Laws Of Motion Level: Misc Level
A 60 kg boy is coasting along on his 15 kg bike at a velocity of 4 m/s carrying a 10 kg pack. He drops the pack.A) What will happen to the boy /bike system after he loses the pack. B) What is the bike's velocity after the rider drops the pack.
Physics Simple Machines Level: Misc Level
A boy throws a 0.1 kg snowball, with a velocity of 10 m/s at a 0. 3 kg target on a fence. A) When the snowball hits, it sticks to the target and the they go flying. What is their velocity. B)Later the same boy hits a 0.15 kg stone with a baseball bat. If the stone flies off at 20 m/s and he hit the stone with a force of 50 N, how long was the bat in contact with the ball.
C)What quantity has the units newton x seconds.
Physics Work,Power & Energy Level: Misc Level
A 1.0 kg pendulum bob is raised such that it s 1.0 m long string forms a 30 degree angle from the vertical. A) What is the potential energy of the pendulum when the bob is at the 30 degree angle.B) If the bob is released, what is its velocity as it passes through the lowest point.
