Speed and velocity Quiz 1

Question 1

Ankit started to run to his school as he woke up late with a speed of $$5\,m{{s}^{-1}}$$ at $$9:45\,AM$$. The distance between his school and home is $$10\,km$$ and also the bell will ring at $$10:00\,AM$$.Will he reach the school before the bell?

Accepted Answer

No

Answer

Yes

Answer

Can’t say

Answer

None of these

Question 2

State true or false in the following. $$\$$ In the case of a vehicle is in motion, the distance at which vehicle stops will be directly proportional to starting velocity. $$\$$ In the case of a vehicle is in motion, the distance at which vehicle stops will be directly proportional to retarding acceleration.

Accepted Answer

F-F

Answer

T-F

Answer

F-T

Answer

T-T

Question 3

Mohit went to the market at $$4:00\,PM$$ and he travels at $$10	ext{ m}{{s}^{-1}}$$ to the market. He reached there at $$4:10\,PM$$. After ten minutes, he came back home with a speed of $$20	ext{ m}{{s}^{-1}}$$. He reached home at $$4:25\,PM$$. Calculate his average velocity.

Accepted Answer

$$0\,m{{s}^{-1}}$$

Answer

$$10\,m{{s}^{-1}}$$

Answer

$$20\,m{{s}^{-1}}$$

Answer

$$30\,m{{s}^{-1}}$$

Question 4

Fill in the blanks: $$\$$ The average velocity can be defined as ……… $$\$$ The instantaneous velocity can be defined as …………..

Accepted Answer

$$\dfrac{\Delta x}{\Delta t}$$,$$\underset{\Delta t	o 0}{\mathop{\lim }}\,\dfrac{\Delta x}{\Delta t}$$

Answer

$$\underset{\Delta t	o 0}{\mathop{\lim }}\,\dfrac{\Delta x}{\Delta t}$$,$$\dfrac{\Delta x}{\Delta t}$$

Answer

$$\dfrac{\Delta x}{\Delta t}$$,$$\dfrac{\Delta x}{\Delta t}$$

Answer

$$\underset{\Delta t	o 0}{\mathop{\lim }}\,\dfrac{\Delta x}{\Delta t}$$,$$\underset{\Delta t	o 0}{\mathop{\lim }}\,\dfrac{\Delta x}{\Delta t}$$

Question 5

Medha was walking through her garden for ten minutes with a velocity $$13\,m{{s}^{-1}}$$.Suddenly she fell down by hitting a stone. The velocity at which she fell down can be categorised as…………..

Accepted Answer

Instantaneous velocity

Answer

Average velocity

Answer

Total velocity

Answer

Retarding velocity