A parachutist after bailing out falls 20 , ,m without friction. W… - Vidyadip

MCQ

A parachutist after bailing out falls $20\,\,m$ without friction. When parachute opens, it decelerates at $2\,\,m/s^2.$ He reached the ground with a speed with a speed of $4\,\,m/s.$ At what height, did he bail out ?......$m$

A
$91$
B
$182$
C
$293$
✓
$116$

✓

Answer

Correct option: D.

$116$

d
$\mathrm{h}=\frac{\mathrm{u}^{2}-\mathrm{v}^{2}}{2 \mathrm{a}}$

$\mathrm{h}=\frac{400-16}{4}=\frac{384}{4}$

$h=96 \mathrm{m}$

$\mathrm{H}=20+96=116 \mathrm{m}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 2. motion in straight line→2. motion in straight line — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which one of the following statements is true for the speed $v$ and the acceleration $a$ of a particle executing simple harmonic motion

The initial velocity of a particle is $u\left(\right.$ at $t=0$ ) and the acceleration a is given by $\alpha t^{3 / 2}$. Which of the following relations is valid?

The mass and diameter of a planet are twice those of earth. What will be the period of oscillation of a pendulum on this planet if it is a seconds pendulum on earth ?

Find moment of inertia of a uniform annular disc of mass $100 \,g$, having inner radius $10\, cm$ and outer radius $20\, cm$, about an axis passing through its centre and perpendicular to its plane.

Equation of a plane progressive wave is given by $\text{y}=0.6\sin2\pi\Big(\text{t}-\frac{\text{x}}{2}\Big).$ On reflection from a denser medium its amplitude becomes 2/3 of the amplitude of the incident wave. The equation of the reflected wave is:

If earth is supposed to be a sphere of radius R, if $g_{30}$ is value of acceleration due to gravity at latitude of $ 30^\circ$ and g at the equator, the value of $g - {g_{{{30}^o}}}$ is

Three surfaces of liquid are shown here. Find the correct statements

A sphere is rolling without slipping on a fixed horizontal plane surface. $A$ is the point of contact, $B$ is the centre of the sphere and $C$ is top most point.Then

Which of the following particles will describe the smallest circle when projected with the same velocity perpendicular to a magnetic field?

The figure shows a velocity-time graph of a particle moving along a straight line The correct acceleration-time graph of the particle is shown as