JEE Mains · Physics · STD 11 - 2. motion in straight line
A cyclist starts from the point \(P\) of a circular ground of radius \(2 \mathrm{~km}\) and travels along its circumference to the point \(\mathrm{S}\). The displacement of a cyclist is _______.
- A \(6 \mathrm{~km}\)
- B \(\sqrt{8} \mathrm{~km}\)
- C \(4 \mathrm{~km}\)
- D \(8 \mathrm{~km}\)
Answer & Solution
Correct Answer
(B) \(\sqrt{8} \mathrm{~km}\)
Step-by-step Solution
Detailed explanation
\(\therefore\) Displacement \(=\mathrm{R} \sqrt{2}=2 \sqrt{2}=\sqrt{8} \mathrm{~km}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The correct truth table for the following logic circuit is _______.
JEE Mains 2024 Hard - If the two metals \(A\) and \(B\) are exposed to radiation of wavelength \(350\,nm\). The work functions of metals \(A\) and \(B\) are \(4.8\,eV\) and \(2.2\,eV\). Then choose the correct optionJEE Mains 2023 Medium
- The momentum of an electron revolving in \(n ^{\text {th }}\) orbit is given by: (Symbols have their usual meanings)JEE Mains 2022 Easy
- Two radioactive elements \(A\) and \(B\) initially have same number of atoms. The half life of \(A\) is same as the average life of \(B\). If \(\lambda_A\) and \(\lambda_B\) are decay constants of \(A\) and \(B\) respectively, then choose the correct relation from the given options.JEE Mains 2023 Easy
- A spaceship orbits around a planet at a height of \(20\,km\) from its surface. Assuming that only gravitational field of the plant acts on the spaceship. What will be the number of complete revolutions made by the spaceship in \(24\,hours\) around the plane? [Given: Mass of plane \(= 8 \times 10^{22}\,kg,\) Radius of planet \(= 2\times 10^6\,m,\) Gravitational constant \(G = 6.67\times 10^{-11}\,Mn^2/kg^2\) ]JEE Mains 2019 Hard
- A pole is vertically submerged in swimming pool, such that it gives a length of shadow \(2.15 \,m\) within water when sunlight is incident at an angle of \(30^{\circ}\) with the surface of water. If swimming pool is filled to a height of \(1.5\,m\), then the height of the pole above the water surface in centimetres is \(\left(\eta_W=4 / 3\right)........\)JEE Mains 2023 Hard
More PYQs from JEE Mains
- Let two vertices of triangle \(ABC\) be \((2,4,6)\) and \((0,-2,-5)\), and its centroid be \((2,1,-1)\). If the image of third vertex in the plane \(x+2 y+4 z=11\) is \((\alpha, \beta, \gamma)\), then \(\alpha \beta+\beta \gamma+\gamma \alpha\) is equal toJEE Mains 2023 Hard
- A galvanometer has a \(50\) \(division\) scale. Battery has no internal resistance. It is found that there is deflection of \(40\) \(divisions\) when \(R = 2400\,\Omega \). Deflection becomes \(20\) \(divisions\) when resistance taken from resistance box is \(4900\,\Omega \) . Then we can conclude
JEE Mains 2016 Hard - Two vertical poles \(AB =15 m\) and \(CD =10 m\) are standing apart on a horizontal ground with points \(A\) and \(C\) on the ground. If \(P\) is the point of intersection of \(BC\) and \(AD ,\) then the height of \(P\) (in \(m\) ) above the line \(AC\) isJEE Mains 2020 Medium
- If the line, \(\frac{{x - 3}}{1} = \frac{{y + 2}}{{ - 1}} = \frac{{z + \lambda }}{{ - 2}}\) lies in the plane, \(2x- 4y + 3z\, = 2\), then the shortest distance between this line and the line, \(\frac{{x - 1}}{{12}} = \frac{y}{9} = \frac{z}{4}\) isJEE Mains 2017 Hard
- The velocity of the bullet becomes one third after it penetrates \(4\,cm\) in a wooden block. Assuming that bullet is facing a constant resistance during its motion in the block. The bullet stops completely after travelling at \((4+x)\,cm\) inside the block. The value of \(x\) is\(.....\)JEE Mains 2022 Medium
- Let \(P (-2,-1,1)\) and \(Q \left(\frac{56}{17}, \frac{43}{17}, \frac{111}{17}\right)\) be the vertices of the rhombus PRQS. If the direction ratios of the diagonal \(RS\) are \(\alpha,-1, \beta\), where both \(\alpha\) and \(\beta\) are integers of minimum absolute values, then \(\alpha^{2}+\beta^{2}\) is equal to \(.....\)JEE Mains 2022 Hard