# Physics

## Trending Questions

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**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?

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

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Distinguish between speed and velocity.

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

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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?

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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.

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

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Distinguish between distance and displacement?

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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?

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

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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.

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What is the definition of light?

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Examples of Newton's 1st law of motion

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Convert the following temperatures to the Celsius scale.

1. $300\mathrm{K}$

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

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

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

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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 0.1 ms−2 for 2 minutes. Find

(a) the speed acquired, (b) the distance travelled.

- 10 ms−1 , 700 m
- 12 ms−1 , 720 m
- 12 ms−1 , 700 m
- 10 ms−1 , 720 m

**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?

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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 ?

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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.

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Write examples of uniform motion and non-uniform motion.

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

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

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Important formulas in the chapter force and laws of motion.

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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.