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A mountain climber, who has has physics in high school, figures out the gravity at his location in the mountains. He used a 4.0 m length of string and found that with a rock tied at its end , its period as a pendulum was 4.1 seconds. What was gravity at his location?
You have invented a new game and are playing it with your friends. You have a projectile launcher that fires a brick (mass=2 kg) with a speed and angle that you can adjust. What is the work done by friction during the block's motion
A silver coin has the mass of 17.75g. If the atomic mass of silver is 107.868u, how many silver atoms are in the coin
A 64-kg skier is going down a slope oriented 36° above the horizontal. Determine the pressure that each ski exerts on the snow
A 13.6 kg object on a horizontal frictionless surface is attached to a spring with k = 519 N/m. find the initial potential energy of the block-spring system
A stroboscope is a light that flashes on and off at a fix rate. It can be used to illuminate a rotating object, Find the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an an..
A spring is resting vertically on a table. A small box is dropped onto the top of the spring and compresses it. Determine the magnitude of the spring's displacement at an instant when the acceleration of the box is zero
A pilot releases a package from a plane flying horizontally at a constant speed. When the package reaches the ground below, what is the horizontal location of the plane
Two 75.0 W (120 V) lightbulbs are wired in series, then the combination is connected to a 230 V supply. How much power is dissipated by each bulb
The slope of the velocity time graph is the instantaneous acceleration. Instantaneous velocity is the derivative of the displacement time function. Average acceleration and instantaneous acceleration are always the same.
A small wheeled vehicle will be sent to the planet Mars to explore its surface. The vehicle contains accelerometers that consist of a small pendulum. at what angle will the pendulum swing out
Mary e is a 30 year old female who recently started having symptoms of muscle weakness. She says that she gets fatigued easily and has even had some numbness in her fingers. She is afraid to drive at night because she is having trouble “seeing cle..
when a raindrop falls it increases in size so its mass at time t is a function of t mt. the rate of growth of the mass
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