A small ball of mass m,-0.84kg and initial speed v,-18.2m/s makes a collision with another ball of mass m, -1.4kg which is initially at rest on a frictionless horizontal table. After the collision the balls move as shown in the figure. Given 8-24°, determine the speed of m; just after the collision, that is, v;-? Express you answer using one decimal place.

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 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?