Embibe Experts Solutions for Chapter: Kinematics, Exercise 6: BEGINNER'S BOX - 6

Calculate the acceleration of the system, tension in the string and thrust on the pulley in terms of g for the situation shown in following diagram.

Two blocks of masses 8kg and 4 kg respectively are connected by a string as shown. Calculate their accelerations if they are initially at rest on the floor, after a force of 100N is applied on the pulley in the upward direction (g = 10 m/s²)

$s-t$ graph of two particles $A$ and $B$ are shown in fig. Find the ratio of velocity of $A$ to velocity of $B$.

Position-time graph of a particle in motion is shown in fig. Calculate -

Total distance covered :

Position-time graph of a particle in motion is shown in fig. Calculate -

Displacement :

Position-time graph of a particle in motion is shown in fig. Calculate -

Average speed :

Position-time graph of a particle in motion is shown in fig. Calculate -

Average velocity :

The position-time $\left(x-t\right)$ graphs for two children $A$ and $B$ returning from their school $O$ to their homes $P$ and $Q$ respectively are shown in fig. Choose correct entries in the brackets below :

(a) $\left(A/B\right)$ lives closer to the school than $\left(B/A\right)$ 

(b) $\left(A/B\right)$ starts from the school earlier than $\left(B/A\right)$ 

(c) $\left(A/B\right)$ walks faster than $\left(B/A\right)$ 

(d) $A$ and $B$ reach home at the (same different) time

(e) $\left(A/B\right)$ overtakes $\left(B/A\right)$ on the road (once/ twice).