Physics

Q. Question 2
A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds?

Q.

A bus decreases its speed from 80 km/h to 60 km/h in 5 seconds. Find the acceleration of the bus.

Q.

Distinguish between speed and velocity.

Q.

An object has moved through the distance . can it have zero displacement? If 'yes' support your answer with an example ?

Q.

Abdul while driving to school computes the average speed for his trip to be 20 km/h. On his return trip along the same route there is less traffic and average speed is 30 km/h. What is the average speed for Abduls whole trip?

Q.

A motorcyclist drives from A to B with a uniform speed of $30\raisebox{1ex}{$km$}\!\left/ \!\raisebox{-1ex}{$h$}\right.$ and returns back with a speed of $20\raisebox{1ex}{$km$}\!\left/ \!\raisebox{-1ex}{$h$}\right.$. Find its average speed.

Q.

A racing car has a uniform acceleration of $4{\mathrm{ms}}^{-2}$. What distance will it cover in $10\mathrm{s}$ after start?

Q.

Distinguish between distance and displacement?

Q.

A bus decreases its speed from $80km{h}^{-1}$ to $60km{h}^{-1}$ in $5s$, find the acceleration of the bus.

Q. Which of the following is true for displacement?

1. It can not be zero if an object has travelled some distance.
2. Its magnitude is always equal or greater than the distance travelled by an object.
3. It is a scalar quantity.
4. Its magnitude is equal to or less than the distance travelled by an object.

Q.

A car travels 30km at a uniform speed of 40km/h and next 30 km at a uniform speed of 20km/h. find its average speed.

Q.

What is the definition of light?

Q.

Examples of Newton's 1st law of motion

Q.

Convert the following temperatures to the Celsius scale.

1. $300\mathrm{K}$

Q.

What is the relation between wavelength, frequency, and velocity?

Q.

Write the full form of CGS, FPS, MKS, and SI?

Q.

The object travels 16m in 4s and then another 16m in 2s. What is the average speed of the object?

Q.

A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Calculate the average speed for the whole journey.

Q.

Convert the following temperatures to the Celsius scale.

${25}^{\circ }\mathrm{C}$

Q. A bus starting from rest moves with a uniform acceleration of $0.1m{s}^{-2}$ for $2minutes$. Find
(a) the speed acquired, (b) the distance travelled.

1. $10m{s}^{-1}$ , $700m$
2. $12m{s}^{-1}$ , $720m$
3. $12m{s}^{-1}$ , $700m$
4. $10m{s}^{-1}$ , $720m$

Q.

Usha swims in a 90 m long pool. She covers 180 m in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Usha.

Why displacement is taken 0 here?

Q.

The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey ?

Q.

A car accelerates uniformly from $18km/hr$ to $36km/hr$ in $5s$. Calculate the acceleration and the distance covered by the car in that time.

Q. Define uniform and non-uniform motion.

Q.

Write examples of uniform motion and non-uniform motion.

Q.

$1cm$ equals to how many $metres$?

Q.

Write the formula for distance traveled in n^th second.

Q.

Important formulas in the chapter force and laws of motion.

Q.

A train is travelling at a speed of 90 km per hour. Brakes are applied so as to produce a uniform acceleration - 0.5 metres per second square. Find how far the train will go before it is brought to rest.

Q. Give examples of the effects of force.