While watching a softball game you see a play that makes you wonder how fast a fielder can react to a hit, run to the fence, and leap up to make the catch. In this play, the batter hits a ball when it is barely off the ground. It looks like it will be home run over the left center field wall which is in a distance D= 215.0 ft from home plate. As soon as the ball is hit, the left fielder runs to the wall, leaps high, and catches it just before it clears the top of the wall with height h= 10.0 ft . You estimate that the ball left the bat at an angle of θ=30°.

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia