Question Answers

Referring to v – s diagram, find: a. Acceleration of the particle when its velocity becomes half of the initial velocity. b. Total distance covered by the particle find: a. Acceleration of the particle when its velocity becomes half of the initial velocity. b. Total distance covered by the particle Referring to v - s [...]

The terminal velocity v of a small steel ball of radius r falling under gravity through a column of a viscous liquid of coefficient of viscosity η depends on mass of the ball m, acceleration due to gravity g, coefficient of viscosity η and radius r. Which of the following relations is dimensionally correct ? [...]

A rigid ball traveling in a straight line ( the x axis) hits a solid wall and suddenly rebounds during a brief instant. The vx -t graph in Fig. 4,130 shows this ball’s velocity as a function of time. During the first 20 s of its motion, find (a) its displacement 130 shows this ball's [...]

Two cars A and B, move along the x axis. Car A starts from rest with constant acceleration while car B moves with constant velocity. A. At what time (s) , t (s), if any, do A and B have the same position? do A and B have the same position? if any move along [...]

The ratio of the terminal velocities of two drops of radii R and R/2 is The ratio of the terminal velocities of two drops of radii R and R/2 is September 18, 2020 Category: Arihant Physics by D.C Pandey , Chapter 13 - Fluid Mechanics , Volume 1 ,

A car accelerates from rest at a constant rate alpha for some time, after which it decelerates at a constant rate of beta to come to rest. If the total time elapsed is t second, then calculate a. The maximum velocity attained by the car, and b. the total displacement A car accelerates from rest [...]

If density of earth increased 4 times and its radius become half of what it is, our weight will ? If density of earth increased 4 times and its radius become half of what it is our weight will ? September 18, 2020 Category: Arihant Physics by D.C Pandey , Chapter 10 - Gravitation , [...]

A cockroach moves rectilinearly such that after sometime t0 let its (instantaneous) velocity be equal to its average velocity over that time. Referring to the s delta t graph as shown in Fig. 4.128 for the motion of the cockroach, A physics professor leaves her house and walks along the sidewalk towards campus. After 5 [...]

The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : 2. The acceleration due to gravity on the planets will be in ratio The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : [...]

If the earth suddenly shrinks (without changing mass) to half of its present radius, then acceleration due to gravity will be If the earth suddenly shrinks (without changing mass) to half of its present radius then acceleration due to gravity will be September 18, 2020 Category: Arihant Physics by D.C Pandey , Chapter 10 - [...]