MCQ
Two projectiles $A$ and $B$ are thrown with the same speed such that $A$ makes angle $\theta$ with the horizontal and $B$ makes angle $\theta$ with the vertical, then
  • A
    Both must have same time of flight
  • B
    Both must achieve same maximum height
  • C
    Amust have more horizontal range than $B$
  • Both may have same time of flight

Answer

Correct option: D.
Both may have same time of flight
d
Depending on the value of $\theta$ one can have same or different time of flight, range o maximum height. Therefore must statement is wrong. They may be equal or may not be. This is only possible for $\theta=45^{\circ}$

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

Similar questions

A resistor of resistance $R$ is connected to an ideal battery. If the value of $R$ is decreased, the power dissipated in the resistor will:
The initial velocity of a particle of mass $2\,kg$ is $(4 \hat{ i }+4 \hat{ j })\,m / s$. A constant force of $-20 \hat{ j }\,N$ is applied on the particle. Initially, the particle was at $(0,0)$. Find the $x$-coordinate of the point where its $y$-coordinate is again zero.$..........\,m$
Given below is the plot of a potential energy function $U(x)$ for a system, in which a particle is in one dimensional motion, while a conservative force $F(x)$ acts on it. Suppose that $E_{\text {mech }}=8\, {J}$, the incorrect statement for this system is:
A wheel of radius 20cm is pushed to move it on a rough horizontal surface. It is found to move through a distance of 60cm on they road during the time it completes one revolution about the centre. Assume that the linear and the angular accelerations are uniform. The frictional force acting on the wheel by the surface is:
A whistle revolves in a circle with an angular speed of $20\; rad/sec$ using a string of length $50 \;cm.$ If the frequency of sound from the whistle is $385\; Hz,$ then what is the minimum frequency heard by an observer, which is far away from the centre in the same plane ... $Hz$ ? ($v = 340 \;m/s$)
A drilling machine of $10\,KW$ power is used to drill a bore in a small aluminium block of mass $8\,kg.$ If $50\%$ of power is used up in heating the machine itself or lost to the surroundings then  ........ $^oC$  is the rise in temperature of the block in $2.5\,minutes$

[specific heat of aluminium $= 0.91\,J/g\,\,^oc$ ]

In $5\, minutes,$ a body cools from $75^{\circ} {C}$ to $65^{\circ} {C}$ at room temperature of $25^{\circ} {C}$. The temperature of body at the end of next $5\, minutes$ is $......\,{ }^{\circ} {C} .$
What is/are the same for $O_2$ and $NH_3$ in gaseous state
A big explosion on the moon cannot be heard on the earth because
The resultant of $\overrightarrow{\text{A}}$ and $\overrightarrow{\text{B}}$ makes an angle a with $\overrightarrow{\text{A}}$ and $\beta$ with $\overrightarrow{\text{B}},$