A student hangs a weight on a newtonmeter. The energy now stored in the spring in the newtonmeter
is 4.5 x 10-2 J The student then increases the weight
on the newtonmeter by 2.0 N Calculate the total
extension of the spring. Spring constant = 400 N/m
Uses the equation Elastic potential energy = 0.5 x
spring constant x extension2 This is a multistep
calculation (Hint: first work out the original
extension, work out the extra extension when the
extra weight is added)
No

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

How many times did thomas edison mess up the light bulb