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1) Is it possible for the frictional force to increase the mechanical energy of a system?
2) How a car's airbag works in terms of momentum? AND in terms of energy?
3) A solid sphere, hoop, and disk (all with same mass and radius) are rolled up an incline with (potentially) different initial speeds. They each reach the same height up the incline. Compare the initial speed that they each enter the incline and explain the order. Why is one greater than another and/or why are they the same?
4) A ball rolls up a ramp which abruptly ends with the ramp dropping straight down. The ball launches off the end of the ramp while still traveling at an upward trajectory, goes through projectile motion, and returns to the same height as the base of the ramp. Ignoring any slowing friction (rolling friction), when the ball returns to the height of the ramp's base, the ball lands with a greater speed than when it entered the ramp.
A basketball star covers 2.75 m horizontally in a jump to dunk the ball. His motion through space can be modeled precisely as that of a particle at his center of mass. Determine his time of flight
Water flowing through a hose at 4 m/s fills a 900L child's pool in 8 min, What is the diameter in cm of the hose
A 50.0 kg child stands at the rim of a merry-go-round of radius 2.10 m, rotating with an angular speed of 2.90 rad/s. What is the child's centripetal acceleration
An object of mass m, is attached to a spring balance and its weight w is recorded. What will be the result if the object is taken to the moon and weighed there where the gravitational field strength is less?
a monkey escapes from the zoo and climbs a tree. after failing to entice the monkey down the zookeeper fires a
A pinada, practically in a shape of a slender thin rod of length mass 4.0 kg is hanging from the tree branch after being hinged at one end. Estimate how high the pinada will swing
in a physics lab experiment a spring clamped to the table shoots a 19g ball horizontally. when the spring is compressed
consider a conical pendulum that consists of a bob on one end of a string of negligible mass with the other end of the
What is the threshold frequency for the photoelectric effect of uranium (phi = 3.6 eV)
a nasa mission to update the electronics on a circular orbiting space station has required the work of four astronauts.
Three point charges, +q, +Q, -Q are placed at the corners ofan equilateral triangle. No other charged objects are near by. What is the total electric force on the system ofthree charges
A space probe in deep space is moving along the x-axis at a speed of v0 when it is hit by a meteor. What is the final direction and speed (in terms of v0) of the probe
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