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## Mastering Physics Homework 2 Answers

Ch 2Due: 11:59pm on Friday, January 29, 2016You will receive no credit for items you complete after the assignment is due. Grading PolicyPrelecture Concept Question 2.02Part AWhat shape do we expect for a graph showing the position of a motorcycle versus time if the motorcycle is speeding upwith a constant acceleration?ANSWER:CorrectPrelecture Concept Question 2.09Part AOn the Moon, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock has aspeed vafter falling from its point of release for a time t. Assuming that the rock does not hit the ground first, how fastwill it be moving after it has fallen for a time 4tfrom its point of release?ANSWER:CorrectProblem 2.10The position versus time graph is a line with a positive slope.The position versus time graph is a horizontal line.The position versus time graph is parabolic.The position versus time graph is a line with a negative slope.16v8v4v2v

Physics is that which need a lot more than what we think!. Its easy only when its studied with basic things like conceptual understanding, imagination, with creativity. Sometimes it happens that even though concepts are understood you may get struck up with problems. There is a easy way to solve any problem in general using the below steps:

1. Read the given quantities and list it down and observe what is asked!
2. Apply the proper formula and substitute the given quantities and try to solve
3. Calculate properly and get the answer.

Still you get stuck up with the problems or concepts in physics you can get the online tutoring at tutorvista.com. These tutors are excellent at physics and give you a very good tutoring any time 24/7.

## Physics Problems

Here are some sample physics problems you can go through it:

### Solved Examples

Question 1: If 5 v is applied across the circuit with 10 $\Omega$ resistance. Calculate the current flowing through the circuit?
Solution:

Given: Voltage v = 5v, Resistance R = 10 $\omega$.
The current through the conductor is given by

I = $\frac{v}{R}$ = $\frac{5v}{10 \omega}$ = 0.5 A

Question 2: A car accelerates from rest at speed 6 m/s for 5 s. Calculate the acceleration.
Solution:

Initial velocity u = 0, Final velocity v = 6 m/s, time taken t = 5s
The acceleration is given as

a = $\frac{v-u}{t}$ = $\frac{10 m/s - 0}{5s}$ = 2 m/s2.