JEE Main Mechanics — practice questions
67 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice JEE Main Mechanics in the app →If $S=f(t)$ is the displacement of a particle moving in a straight line, then acceleration isWhich of the following is a scalar quantity according to the notes?The table of displacement, velocity, and acceleration graphs includes a case of motion with constant velocity.In uniform circular motion of radius $r$ and speed $v$, the angular speed $\omega$ isThe trajectory equation of a projectile shows that its path is aA projectile is launched with initial speed $v_0$ at angle $\theta$. Its maximum height is given byFor a projectile launched with speed $v_0$ at angle $\theta$, the horizontal range isProjectile motion near the Earth's surface can be treated as two independent motions becauseWhich statement about the signs of $v$ and $v_0$ in vertical motion is correct?In free fall, if the upward direction is chosen as the positive $y$-axis, the velocity after time $t$ isA particle starts from rest and moves with constant acceleration $a$. Which expression gives its displacement For motion with constant acceleration, which equation directly relates final velocity $v$, initial velocity $vInstantaneous acceleration is best described asInstantaneous velocity $v(t)$ is given mathematically byWhich statement correctly distinguishes average velocity from average speed?The displacement of a particle moving along the $x$-axis from initial position $x_i$ to final position $x_f$ iWhat is the SI unit and nature of velocity according to the summary table?A ball is thrown vertically upward. If upward is taken as positive, which statement is correct for its motion For a velocity-time graph, the slope representsFor a displacement-time graph, the slope representsIn straight-line motion with constant acceleration, which equation correctly relates final velocity $v$, initiWhich statement about acceleration is correct?A body moves 30 m east in 5 s and then 10 m west in 5 s. What is its average velocity over the entire 10 s intWhich statement about speed and velocity is correct?Which type of motion is correctly matched with its description?A particle moves from one point to another along a curved path and finally returns to its starting point. WhicWhich of the following is a correct comparison between distance and displacement?An object is said to be at rest whenWhich statement best describes kinematics?A problem gives a graph of force versus displacement for a particle. To determine the work done by the force, Instantaneous power delivered by a force is best expressed as:Average power is defined as:A block slides down a smooth incline. Which statement is correct?In a system where only conservative forces act, which quantity remains constant?Which statement correctly distinguishes conservative and non-conservative forces?A body falls vertically under gravity with negligible air resistance. Which energy conversion primarily occursA particle of mass $m$ has momentum $p$. Its kinetic energy is given by:According to the work-energy theorem, the net work done on a particle is equal to:Which of the following is an example of elastic potential energy?Work done by a force on a body is negative when:The SI units of work, energy, and power are respectively:Which statement best defines work done by a force in mechanics?A body is observed to be at rest at a certain instant. Which conclusion is most justified?Which of the following sets contains one field force, one contact force, and one force due to attachment to anA body has zero net force acting on it, but the net moment of forces about some axis is nonzero. Which statemeWhy can a contact force be maintained only up to a certain limit?A rope pulls a block to which it is tied. The force exerted by the rope on the block is best described asWhich statement correctly distinguishes field forces from contact forces?A ball thrown vertically upward is momentarily at rest at its highest point. Why is it not in equilibrium therA body is at rest. Which additional statement is necessary to conclude that it is in equilibrium?The condition for translational equilibrium of a body isFor a body to be in equilibrium, which condition must be satisfied?Spring force belongs to the category of attachment to another body. Its magnitude is represented by which exprWhich pair consists entirely of contact forces?A force is classified as a contact force when itWhich of the following is a field force rather than a contact force?If the unit of mass is $\alpha$ kg, unit of length is $\beta$ m and unit of time is $\gamma$ s, then the new uIn an experiment, length = 2.54 cm, radius = 0.25 cm. The volume of the cylinder with proper significant figurWhich of the following is not a correct application of dimensional analysis?Statement I: If the units of force, velocity and time are taken as fundamental units, then the dimensional forStatement I: The expression $ qrt{\frac{ke^2}{G}}$ has the same dimensions as power.
Statement II: DimensionaThe dimensional formula of angular momentum per unit mass is:Which of the following pairs has the same dimensions?The dimensional formula of pressure is:In the expression $F = \frac{Gm_1m_2}{r^2}$, the dimensional formula of $G$ is:If the dimensions of a physical quantity are $[M^aL^bT^c]$, then it represents:If force (F), velocity (V) and time (T) are taken as fundamental quantities, then the dimensions of mass are: