is the difference between two opposing forces. Newton’s 2nd Law of Motion states that if a net force acts on an object, the object will in the direction of the force. Acceleration is a change in . It can either be or . Mass is the amount of matter contained in an object. Mass does not change with changes in . The acceleration of any object falling to the surface of the Earth is . This means that at the first second, the object will be falling with a speed of 9.8. m/s2. At 2 seconds, the object will be falling at the rate of ; at 3 seconds, it will be falling at the rate of , and so on.

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.