A cat kicks a 0.43\,\text {kg}0.43kg0, point, 43, start text, k, g, end text cheese block that was initially at rest. The net force on the cheese over time is shown below. What is the cheese's speed at t =20\,\text {ms}t=20mst, equals, 20, start text, m, s, end text?
Round answer to two significant figures.
Note that time is in \text{ms}msstart text, m, s, end text.

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)

What object a collides with object b and bounces back its final momentum is?

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.