Quiz Instructions Question 1
1 pts
Which of the following advancements in science was primarily achieved by Aristotle?
a. the discovery that all objects fall at the same rate
o the development of the atomic theory of matter
O the use of formalized logic in the sciences
O the development of the heliocentric model

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground