An object moves along a straight line with an acceleration of $2\ m/s^2$. If its initial speed is $10\ m/s$, what will be its speed $2\ s$ later?

Academic Physics NCERT Class 9

Here, acceleration $a=2\ m/s^2$

Initial velocity $u=10\ m/s$

Time $t=2\ s$

Final velocity $v=?$

On using the first equation of the motion $v=u+at$

Or $v=10+2\times2$

Or $v=10+4$

Or $v=14\ m/s$

Thus, the velocity of the object after $2\ s$ will be $14\ m/s$.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

608 Views

A bus moving along a straight line at $20\ m/s$ undergoes an acceleration of $4\ m/s^2$. After 2 seconds, its speed will be:(a) $8\ m/s$(b) $12\ m/s$(c) $16\ m/s$(d) $28\ m/s$
A bus increases its speed from $36\ km/h$ to $72\ km/h$ in $10\ seconds$. Its acceleration is:(a) $5\ m/s^2$(b) $2\ m/s^2$(c) $3.6\ m/s^2$(d) $1\ m/s^2$
A body of mass $2\ kg$ is thrown vertically upwards with an initial velocity of $20\ m/s$. What will be its potential energy at the end of $2\ s$? $(Assume\ g=10\ m/s^2)$.
When a car driver travelling at a speed of $10\ m/s$ applies brakes and brings the car to rest in $20\ s$, then retardation will be:(a) $+2\ m/s^2$(b) $-2\ m/s^2$(c) $-0.5\ m/s^2$(d) $+0.5\ m/s^2$
If the mass of an object be $10\ kg$, what is its weight? $(g=9.8\ m/s^2)$.
An object travels $20\ m$ in $5\ s$ and then another $40\ m$ in $5\ s$. What is the average speed of the object?$6\ m/s$$0\ m/s$$12\ m/s$$2\ m/s$
A motor cycle moving with a speed of $5\ m/s$ is subjected to an acceleration of $0.2\ m/s^2$. Calculate the speed of the motor cycle after $10\ second$.
An object dropped from a cliff falls with a constant acceleration of $10\ m/s^2$. Find its velocity $5\ s$ after it was dropped.
A motorcycle moving with a speed of $5\ m/s$ is subjected to an acceleration of $0.2\ m/s^2$. Calculate the speed of the motorcycle after 10 seconds, and the distance travelled in this time.
A motorcycle is being driven at a speed of $20\ m/s$ when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be:(a).\ +4\ m/s^2$(b).\ -4\ m/s^2$(c).\ +0.25\ m/s^2$(d).\ -0.25\ m/s^2$
An object travels \( 14 \mathrm{m} \) in \( 4 \mathrm{s} \) and then another 16 m in \( 2 \mathrm{s} \). What is the average speed of the object?
A body of $2\ kg$ falls from rest. What will be its kinetic energy during the fall at the end of $2\ s$? $(Assume\ g=10\ m/s^2)$
A train starting from rest moves with a uniform acceleration of $0.2\ m/s^2$ for $5\ minutes$. Calculate the speed acquired.
The speed of light in air is $3 × 10^8\ m/s$. In medium X its speed is $2 × 10^8\ m/s$ and in medium Y the speed of light is $2.5 × 10^8\ m/s$. Calculate:(a) $_{air} \mathrm{n}_X$(b) $_{air} \mathrm{n}_Y$(c) $_{x} \mathrm{n}_Y$
Which of the following could not be a unit of acceleration?,b>(a) $km/s^2$(b) $cms^{-2}$(c) $km/s$(d) $m/s^2$

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements