1. Very briefly explain how a photogate works. 2. How far would you go if you traveled at a speed of 30 miles per hc 3. What acceleration would be needed to travel the same distance in t # 2 when starting from rest? What would be your final speed?

11:23 4 3 4 Time (s) 2 of 12 1 5 6. Jen made a diagram to compare speed and velocity. Which label belongs in the area marked X? a. Is always constant b. Has direction c. Includes magnitude d. Depends on a reference frame Speed Velocity 7. A train travels 600 km in 4 hours. What is the speed of the train? a. 0.007 km/h b. 604 km/h c. 150 km/h d. 2,400 km/h 8. The free-body diagrams of four objects are shown. Which object has a net force of -5 N c. Y down? a. W b. X d. Z 1F,= 20 N 20N F= 10 N F- 15 N F--10 N F= 10 N F,=-15 N F,- 15 N F,=-10 N F, = 20 N F,= -15 N JÉ = 10 N F=-10 N VF =-15N F--15 N VF, = -25 N W X Y 9. A skateboard rider starts from rest and maintains a constant acceleration of + 0.50 m/s? for 8.4 s. What is the rider's displacement during this time? a. 10 m b. 14 m с. 18 m d. 22 m 10. A sports car can move 100.0 m in the first 4.5 s of uniform acceleration. Find the car's acceleration. a. 9.9 m/s b. 12.5 m/s c. 25.2 m/s d. 45.8 m/s 11. A rolling ball has an initial…

An astronaut on a rocket ship is headed straight for another galaxy and an observer is standing on Earth. If they both shine a flashlight simultaneously as the rocket ship is moving away at a large speed, which of the following is true? A. The person on the rocket measures a higher velocity for the light from the flashlight. B. The person on the Earth measures a higher velocity for the light from the flashlight. C. They both measure the same velocity of light. D. It cannot be determined without additional information.

plz do both

A rocket goes from 0 m/s to 40 meters per second squared in 8 s.  A) after 41s, what is it's final speed in m/s? B) What length of time has passed for the rocket to reach a speed of 7100 m/s?

Plz only solve part d and h... plz solve it correctly

Challenges to Space Exploration a) We can round numbers to say light (and all electromagnetic radiation: radio waves, infrared, ultraviolet, etc.) travels at approximately 3x108 m/s. At its closest approach, Mars is about 0.5 au of the Earth. At this distance, how long would it take for an astronaut on Mars to communicate with Mission Control on Earth? Give your answer in minutes. Explain why Mars rovers have entire sequences for travel pre-programmed and uploaded all at once rather than being driven around in real time with a joystick. For the Earth-Moon distance in 5b, you can use 384,400 km b) The boosters that launched Apollo 11 allowed the astronauts to reach a speed of 25,000 miles per hour. At that speed, about how long did it take for the astronauts to reach the Moon? At that speed, how long would it take to reach Mars, assuming the closest approach distance given above? Give your answers in days.

QUESTION 16 How many seconds are in one year? Assume that one year equals 365 days. a. 86,400 O b.1,500,000 C. 24,360,000 d. 12,536,000 O e. 31,536,000