MCQ
A body is projected horizontally with a velocity of $4\ ms^{-1}$. The velocity of the body after $0.7s$ is nearly $($take $g = 10\ ms^{-2}$)
- A$10\ ms^{-1}$
- ✓$8\ ms^{-1}$
- C$19.2\ ms^{-1}$
- D$11\ ms^{-1}$
✓
Answer
Correct option: B.
$8\ ms^{-1}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
If a Vander-Waal's gas expands freely, then final temperature is
Select the correct choice(s) :
The equation of a longitudinal wave is represented as $y = 20\cos \pi (50t - x)$. Its wavelength is ..... $cm$
→If the sum of two unit vectors is also a unit vector. then magnitude of their difference and angle between the two given unit vectors is ..............
A uniform square plate has a small piece $Q$ of an irregular shape removed and glued to the centre of the plate leaving a hole behind. The moment of inertia about the $z-$axis is then:
→If there is a positive error of $50\%$ in the measurement of velocity of a body, then the error in the measurement of kinetic energy is .............. $\%$
→A $100\, g$ iron ball having velocity $10 \,m/s$ collides with a wall at an angle $30^°$ and rebounds with the same angle. If the period of contact between the ball and wall is $0.1\, second$, then the force experienced by the wall is ........... $N$
→An ideal Carnot heat engine with an efficiency of $30\%$.It absorbs heat from a hot reservoir at $727^o C$. The temperature of the cold reservoir is .... $^oC$
→When temperature of an ideal gas is increased from $27^\circ C$ to $227^\circ C$, its $r.m.s.$ speed changed from $400\, metre/sec$ to ${V_s}.$ The ${V_s}$ is ........ $metre/sec$
→A man waves his arms, while walking. This is: