Question

A stone is thrown in vertically upward direction from the ground with a speed of 20m/s. Then its displacement in 4 sec is (g = 10 2 / ms) 1) 40m 2) zero 3) 20m 4) 80m

Answer 1

Answer:

Explanation:

Solution,

Here, we have

Velocity of stone = 20 m/s

Time taken by stone = 4 seconds

To Find,

Displacement = ??

We know that,

Displacement = Velocity × Time taken

So, putting all the values, we get

⇒ Displacement = Velocity × Time taken

⇒ Displacement = 20 × 4

⇒ Displacement = 80 m/s

Hence, its displacement in 4 sec is 80 m/s.

Hence, 4. option i.e 80 m/s is correct.

Important terms,

Displacement - Displacement is the distance in a particular direction. It is a vector quantity.

Distance - Distance is the actual length of the path covered by a body during the whole journey, without taking into consideration its direction. It is a scalar quantity.

Answer 2

✯✯ QUESTION ✯✯

A stone is thrown in vertically upward direction from the ground with a speed of 20m/s. Then its displacement in 4 sec is (g = 10 2 / ms) ..

1) 40m

2) zero

3) 20m

4) 80m

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✰✰ ANSWER ✰✰

$\longmapsto\tt{Time\:Taken=4\:sec}$

$\longmapsto\tt{Velocity=20m/s}$

$\longmapsto\tt{Displacement = ?}$

➥Using Formula : -

$\longmapsto\tt{\small{\boxed{\bold{\bold{\orange{\sf{Displacement=Velocity\times{Time\:Taken}}}}}}}}$

➥Putting Values : -

$\longmapsto\tt{Displacement=20\times{4}}$

$\longmapsto\tt{Displacement=80m/s}$

☛So. Displacement in 4 sec. will be 80 m/s.

➜Option 4)80 is Correct...

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✔Definitions : -

★Distance : -

The actual path covered by an object is known as Distance..Distance is a scalur quantity...

★Displacement : -

Displacement is defined as change in the position of an object..It is a vector quantity...

★Velocity : -

Velocity is a vector quantity which describes the motion or movement of a particular object..

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