Posted by **jhenz** on Wednesday, July 29, 2009 at 10:32am.

i need solutions for all this problems...help please....

1.) an electron moving at a speed of 4x10 power of 6 m/s, shot through a sheet of paper which is 3x10 to power of -5 m thick. the electron energyfrom the sheet with with a speed of 2x10 to the power of 6 m/s. find the

a.) acceleration experienced y the electron in passing through the sheet and

b.) time take by the electron to pass through the assuming that the acceleration of the electron constant...

2.) the velocity of a train changes from 0 to 60 km/hr in 20 seconds assuming that is uniformly accelerated ,what is the acceleration..?

3.) a body is moving with a velocity of 4 m/s . it is then accelerated for 5 seconds at the rate of 2 m/s squared.

a.) find the speed at the end of the fifth second.

b.)find the distance covered during the first and fifth seconds.

4.)a speeding motorist traveling 120km/h passes a stationary police officer. the officer immediately begins pursuit at a constant acceleration of 10.0 km/h/s (note the mixed units). how much time will it take for the police officer to reach the speeder,assuming that the speeder maintains a constant speed? how fast will the police officer be traveling at this time..?

5.) a light plane must reach a speed of 30 m/s for takeoff.how long a runway is needed if the (constant) acceleration is 3.0m/s squared?

## Answer this Question

## Related Questions

- mechanics- physics - An electron moving at a speed of 5 x 10 raise to power 6m/s...
- mechanics- physics - An electron moving at a speed of 5 x 10 raise to power 6m/s...
- mechanics- physics - An electron moving at a speed of 5 x 10 raise to power 6m/s...
- mechanics- physics - An electron moving at a speed of 5 x 10 raise to power 6m/s...
- Machanics - An electron moving at a speed of 5 multiply by 10 raise to power six...
- Math - Write the following number in standard form (4X10 4th power)+(3X10 3rd ...
- physics - A force of 64 N is required to keep a model power boat moving at a ...
- Physics - In the Bohr model of the hydrogen atom, the speed of the electron is ...
- College Physics - In Chapter 3 we learned that the force of air drag on an ...
- college - let i = the square root of -1 with i to the 1st power =i, i to the 2nd...