A small source of light Sis located at a distance Lfrom a vertical wall. An opaque object with a height of h moves toward the wall with constant velocityv_vec of magnitude v. At time t= 0 , the object is located at the source S. Find an expression for v_s, the magnitude of the velocity v_s_vec of the top of the object's shadow, at time t.

Express the speed of the top of theobject's shadow in terms of t, v,L, and h.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

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)

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?