Four speed - time graphs are shown below Which graph represents following case ? (i) A ball thrown v

English

Gujarati

Hindi

7. MOTION

medium

Four speed$-$time graphs are shown below

Which graph represents the following case ?

$(i)$ A ball thrown vertically upwards and returning to the hand of the thrower ?

$(ii)$ A body decelerating to a constant speed and then accelerating.

Option A

Option B

Option C

Option D

Solution

$(i)$ Graph $(a)$ represents this case. The ball starts with initial velocity; experiences retardation and its velocity decreases to become zero at the highest point. Thereafter the ball falls down and its velocity increases till it again becomes equal to the initial velocity of throw.

$(ii)$ Graph $(d)$ shows the case of a body decelerating to a constant speed and then accelerating.

Standard 9

Science

Can the speed of a body be negative ?

easy

A car manufacturer advertises that the brakes are so perfect that the car stops instantaneously. Comment.

easy

A cheetah can accelerate from rest at the rate of $4 m s^{-2}$

$(i)$ What will be the velocity attained by it in $10\, s$ ?

$(ii)$ How far will it travel in this duration ?

medium

Distance$-$time graph below represents the motion of two buses $A$ and $B$

$(i)$ What is the distance by which bus $B$ was ahead of bus $A$ initially ?

$(ii)$ Do they ever meet each other ? If so, when ?

$(iii)$ What is the distance travelled by bus $A$ when it overtakes bus $B$ ?

$(iv)$ Find out the distance by which bus $A$ was ahead of bus $B$ at $y=12 h$

$(v)$ Which one of them is moving faster ? Give reason.

medium

The displacement of a moving object in a given interval of time is zero. Would the distance travelled by the object also be zero ? Justify you answer.

easy

Four speed$-$time graphs are shown below Which graph represents the following case ? $(i)$ A ball thrown vertically upwards and returning to the hand of the thrower ? $(ii)$ A body decelerating to a constant speed and then accelerating.

Solution

Similar Questions

Can the speed of a body be negative ?

A car manufacturer advertises that the brakes are so perfect that the car stops instantaneously. Comment.

A cheetah can accelerate from rest at the rate of $4 m s^{-2}$ $(i)$ What will be the velocity attained by it in $10\, s$ ? $(ii)$ How far will it travel in this duration ?

The displacement of a moving object in a given interval of time is zero. Would the distance travelled by the object also be zero ? Justify you answer.

Start a Free Trial Now

Four speed$-$time graphs are shown below

Which graph represents the following case ?

$(i)$ A ball thrown vertically upwards and returning to the hand of the thrower ?

$(ii)$ A body decelerating to a constant speed and then accelerating.

A cheetah can accelerate from rest at the rate of $4 m s^{-2}$

$(i)$ What will be the velocity attained by it in $10\, s$ ?

$(ii)$ How far will it travel in this duration ?