A ball of mass 0.2 kg is thrown vertically upwards by applying a … - Vidyadip

MCQ

A ball of mass $0.2\ kg$ is thrown vertically upwards by applying a force by hand. If the hand moves $0.2m$ which applying the force and the ball goes upto $2m$ height further, find the magnitude of the force. Consider $g = 10\ m/ s^2$

A
$22N$
B
$4N$
C
$16N$
✓
$20N$

✓

Answer

Correct option: D.

$20N$

$(i)\ v^2= u^2 + 2ay$
$0 = v^2 - 2(g)2$
$(ii)\ v^2 = 0 + 2a(0.2)$
$a = 100$
$(iii)\ F = ma = 0.2 \times 100 = 20N$

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 Motion in a Straight Line→Motion in a 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

A particle of mass $m $ is moving in a horizontal circle of radius $r$ under a centripetal force equal to $ - K/{r^2}$, where $K$ is a constant. The total energy of the particle is

A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied, which stretches their combined length by $1\, cm$. The two wires will have

The magnitude of the vector product of two vectors $\big|\overrightarrow{\text{A}}\big|$ and $\big|\overrightarrow{\text{B}}\big|$ may be:

The system shown in figure is released then $a_1$ and $a_2$ is

To project a body of mass $m$ from earth's surface to infinity, the required kinetic energy is (assume, the radius of earth is $R_E, g=$ acceleration due to gravity on the surface of earth) :

Let $T_a$ and $T_b$ be the final temperatures of the samples $A$ and $B$, respectively, in the previous question.

If a body of mass $m$ is carried by a lift moving with an upward acceleration $a$, then the forces acting on the body are

(i) the reaction $R$ on the floor of the lift upwards

(ii) the weight $mg$ of the body acting vertically downwards.

The equation of motion will be given by

Two spherical black bodies of radii ${r_1}$ and ${r_2}$ and with surface temperature ${T_1}$and ${T_2}$ respectively radiate the same power. Then the ratio of ${r_1}$ and ${r_2}$ will be

A balloon rises, up with constant net acceleration of $10\,m / s ^2$. After $2\,s$ a particle drops from the balloon. After further $2\,s$ match the following columns. (Take $\left.g=10\,m / s ^2\right)$

colum $I$	colum $II$
$(A)$ Height of particle from ground	$(p)$ $0$
$(B)$ Speed of particle	$(q)$ $10$ SI unit
$(C)$ Displacement of particle	$(r)$ $40$ SI unit
$(D)$ Acceleration of particle	$(s)$ $20$ SI unit

Assume that the earth is a solid sphere of uniform density and a tunnel is dug along its diameter throughout the earth. It is found that when a particle is released in this tunnel, it executes a simple harmonic motion. The mass of the particle is $100 g$. The time period of the motion of the particle will be (approximately) (take $g =10\,ms ^{-2}$, radius of earth $=6400\,km$ )