1. A branch of physics dealing with motion without considering its causes is known as
2. Mechanics is a branch of physics. This branch is
A. Kinematics without dynamics
B. Dynamics without Kinematics
C. Kinematics and dynamics
D. Kinematics or dynamics
Answer : Option C
3. To locate the position of the particle we need
A. A frame of reference
B. Direction of the particle
C. Size of the particle
D. Mass of the particle
Answer : Option A
4. Frame of reference is a _____ and a _____ from where an observer takes his observation,
A. Place, Size
B. Size, Situation
C. Situation, Size
D. Place, Situation
Answer : Option D
As shown in the figure a particle moves from 0 to A, and then A to B. Find path length and displacement.
A particle moves from A to B and then it moves from B to C as shown in figure. Calculate the ratio between path lenghth and displacement.
A particle moves from A to P and then it moves from P to B as shown in the figure. Find path length and dispalcement.
A. \(\frac{2e}{\sqrt{3}} ,e\)
B. \(\frac{e}{\sqrt{3}} ,e\)
C. \(2e,e\)
D. \(e,\frac{2e}{\sqrt{3}} \)
Answer : Option A
8. A car goes from one end to the other end of a semicircular path of diameter ‘d’. Find the ratio between path length and displacement.
A. \(\frac{3\pi }{\sqrt{2}}\)
B. \(\pi \)
C. \(2\)
D. \(\frac{\pi }{\sqrt{2}}\)
Answer : Option D
9. A particle goes from point A to B. Its displacement is X and path length is y. So \(\frac{x}{y}\)
A. \( > 1\)
B. \( < 1\)
C. \( \geqslant 1\)
D. \(\leqslant 1\)
Answer : Option C
Explanation :
Path length is always greater or equal to displacement
As shown in the figure a partricle statrs its motion from O to A. And then it moves from A to B. \(\overline{AB}\) is an arc find the Path length
A. \(2r\)
B. \(r+\frac{\pi }{3}\)
C. \(r\left ( 1+\frac{\pi }{3} \right )\)
D. \(\frac{\pi }{3}(r+1)\)
Answer : Option C