Kinematics: Velocity of a car driving 7 hours at 46km/h then 7 hours at 69km/h, Recon plane, and Electron in a TV.

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1)You drive a car 7 hours at 46kmh then 7 hours at 69kmh. What is your average velocity? Answer in km/h.

2) What is your average velocity if you drive a distance of 402.5 km at a speed of 46 km/h, then the same distance at a speed of 69km/h? Answer in km/h?

3) Assume 1.72km/lap. A car is one lap behind the lead race car when the lead car has 51 laps to go. If the speed of the lead car is 53.6 m/s, what must be the average speed of the second car to catch the lead car just vefore the end of the race at the finish line. Answer in m/s.

4) A recon plane flies 485km away from its base at 708m/s then flies back to its base at 1062 m/s. What is the average speed in m/s?

9) The electrons in a TV set are accelerated in th epicture tube. This region is 1.8cm in length, the electrons enter with a speed of 100000 m/s and leave at 1.5*10^8 m/s. What is their acceleration over this 1.8cm length in m/s^2?
Part b) how long is the electron in the accelerating region in seconds?

After t hours on a particular day, a freight train is s(t) = 20t^2 - (4/3)t^3 miles due east of its starting point (for 0 ? t ? 18).
a) Where is the train (relative to its starting point) after 13 hours?
b) What is the velocity of the train after 13 hours?
c) What is the acceleration of the train after 13 hours?
d) Is the tr

1. A rock is thrown straight up from a bridge at 16m/s and misses the bridge on its way down falling into the water 15m below.
a) What is the maximum height above the water reached by the rock?
b)What is the rock's velocity at the instant before it strikes the water?
2. Car A is driving east at 120 km/h. Car B is driving we

A plane initially flying at 120 m/s [E] accelerates at 5.6 m/s^2[W] for 20.0 s.
a)What is plane's final velocity?
b) What is plane's displacement in this time?
A bullet leaves the muzzle of a gun with a velocity of 410m/s. The length of the gun barrel is 0.50m.
a) What is average velocity of the bullet inside the barrel of

A car has a mass of 900 kg. It accelerates from rest at a rate of 1.2 m/s^2.
a) Calculate the time taken to reach a velocity of 30m/s.
b) Calculate the force required to accelerate the car at a rate of 1.2 m/s^2

If the magnetic induction is 10^-2 weber/m^2 in the x-direction, find the force on an electron whose velocity is 10^7 m/s in
(a) the xy-plane at 45 degrees to the x-axis, (Answer: 1.13x10^-14 N in the z-direction)
(b) a direction making equal angles with the three axes. (Answer: 1.31 x10^-14 N in the YZ-plane)

An automobile traveling v = 85 km/h overtakes a L = 1.15 km long train traveling in the same direction on a track parallel to the road. If the train's speed is 80 km/h, how long does it take the car to pass it (min), and how far will the car have traveled in this time? (km)
What are the results if the carand train are travel

Two relativistic electrons are ejected simultaneously from a piece of potassium in opposite directions each is traveling with a speed of 0.5c with respect to the metal.
a) what is the velocity of electron 1 with respect to electron 2?
b) what is the velocity of electron 2 with respect to electron 1?

In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.35 x 10−17 N during the first 2.04 cm of tube's length; then they move at essentially constant velocity another 44.1 cm before hitting the screen. How long does it take them to travel the length of the tube?
Please use

Please see the attached file. Also, please show all solution details. Thank you.
German physicist Werner Heisenberg related the uncertainty of an object's position (deltax) to the uncertainty in its velocity deltav.
The mass of an electron is 9.11 x 10-31 kg.
What is the uncertainty in the position of an electron moving at 9