Question:
A packet is dropped from a balloon which is going upwards with the velocity $12\, m$ $s^{-1}$, the velocity of the packet after 2 s will be
A packet is dropped from a balloon which is going upwards with the velocity $12\, m$ $s^{-1}$, the velocity of the packet after 2 s will be
Updated On: Jul 5, 2022
- $-12 \,m$ $s^{-1}$
- $12\, m$ $s^{-1}$
- $-7.6\, m$ $s^{-1}$
- $7.6\, m$ $s^{-1}$
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Given velocity of balloon u = $12 ms ^{-1}$
Times t=2 s
when the packet is released from the balloon it aquires the velocity of balloon it means initial velocity of the packet = $12 ms^{-1}$
Hence, velocity after 2 s is given by,
v = u + at
= $12+(-9.8) \times 2$
=$ 12-19.6 = -7.6 ms^{-1}$
(minus sign in due to the motion is in opposite direction)
Was this answer helpful?
0
0
Top Questions on Motion in a straight line
- A bus moving along a straight highway with speed of 72 km/h is brought to halt within 4s after applying the brakes. The distance travelled by the bus during this time (Assume the retardation is uniform) is _______m.
- JEE Main - 2024
- Physics
- Motion in a straight line
- The displacement and the increase in the velocity of a moving particle in the time interval of \( t \) to \( (t + 1) \) s are 125 m and 50 m/s, respectively. The distance travelled by the particle in \( (t + 2)^{\text{th}} \) s is \( \_\_\_\_ \) m.
- JEE Main - 2024
- Physics
- Motion in a straight line
- Two cars are travelling towards each other at a speed of \( 20 \, \text{m/s} \) each. When the cars are \( 300 \, \text{m} \) apart, both the drivers apply brakes and the cars retard at the rate of \( 2 \, \text{m/s}^2 \). The distance between them when they come to rest is:
- JEE Main - 2024
- Physics
- Motion in a straight line
- A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity \(4\ ms^{-1}\). The ball strikes the water surface after \(4s\). The height of bridge above water surface is
(Take: \(g=10\ ms^{-2}\))- NEET (UG) - 2023
- Physics
- Motion in a straight line
- A bullet from a gun is fired on a rectangular wooden block with velocity u. When the bullet travels 24 cm through the block along its length horizontally, velocity of bullet becomes \(\frac{u}{3}\). Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is:
- NEET (UG) - 2023
- Physics
- Motion in a straight line
View More Questions
Questions Asked in Punjab PMET exam
- A wheel is rotating at $ 900\,\,rpm $ about its axis. When the power is cut off it comes to rest in $ 1\min $ . The angular retardation in $ rad/{{s}^{2}} $ is
- Punjab PMET - 2011
- Motion in a plane
- Galileo writes that for angles of projection of a projectile at angles $\left(45^{\circ}+\theta\right)$ and $\left(45^{\circ}-\theta\right)$, the horizontal ranges described by the projectile are in the ratio
- Punjab PMET - 2011
- Motion in a plane
- The potential energy of a weightless spring compressed by a distance a is proportional to
- Punjab PMET - 2011
- Oscillations
- The plane of a dip circle is set in the geographic meridian and the apparent dip is $\delta_1$. It is then set in a vertical plane perpendicular to the geographic meridian. The apparent dip angle is $\delta_2$. The diclination $\theta$ at the plane is
- Punjab PMET - 2011
- the earth's magnetic field
- The wavelength of the first line of Balmer series is $6563\,??. The Rydberg constant for hydrogen is about
View More Questions
Concepts Used:
Motion in a straight line
The motion in a straight line is an object changes its position with respect to its surroundings with time, then it is called in motion. It is a change in the position of an object over time. It is nothing but linear motion.
Types of Linear Motion:
Linear motion is also known as the Rectilinear Motion which are of two types:
- Uniform linear motion with constant velocity or zero acceleration: If a body travels in a straight line by covering an equal amount of distance in an equal interval of time then it is said to have uniform motion.
- Non-Uniform linear motion with variable velocity or non-zero acceleration: Not like the uniform acceleration, the body is said to have a non-uniform motion when the velocity of a body changes by unequal amounts in equal intervals of time. The rate of change of its velocity changes at different points of time during its movement.