Question

30 PTS ... PLS ANSWER THE QUESTION I WILL MARK THE RIGHT ANSWER BRAINLIEST

Answer 1

Question :

A highway rod runs north-south. A bus moves north with a speed of 60 kmph. A car moves south with a speed of 80 kmph. Find,

(i) Relative velocity of car wrt bus

(ii) Relative velocity of bus wrt car

Given :

Speed of bus = 60 kmph

Speed of car = -80 kmph

[Here negative sign shows that car is moving in the opposite direction wrt bus.]

To Find :

Relative velocity of car wrt bus and relative velocity of bus wrt car.

Solution :

★ Relative velocity of object 1 wrt object 2 is given by

• V₁₂ = V₁ - V₂

★ Relative velocity of object 2 wrt object 1 is given by

• V₂₁ = V₂ - V₁

Where V₁ and V₂ are the velocities wrt the ground.

» When the object 1 and 2 move in the same direction, V₁₂ = V₁ - V₂

» When the object 2 moves in the opposite direction of 1, V₁₂ = V₁ + V₂

♦ Relative velocity of car wrt bus :

$\sf:\implies\:V_{CB}=V_C-V_{B}$

$\sf:\implies\:V_{CB}=-80-60$

$:\implies\:\underline{\boxed{\bf{\purple{V_{CB}=-140\:kmph}}}}$

♦ Relative velocity of bus wrt car :

$\sf:\implies\:V_{BC}=V_B-V_{C}$

$\sf:\implies\:V_{BC}=60-(-80)$

$:\implies\:\underline{\boxed{\bf{\orange{V_{BC}=140\:kmph}}}}$

Answer 2

Explanation:

$:⟹VBC=140kmph</p><p>$