Question

Calculate the velocity of a motor care if it accelerated at 1,2m/s for 8 seconds from 25km/h

Answer 1

Answer:

CORRECT QUESTION :–

• Calculate the velocity of a motor car if it accelerated at 1.2m/s² for 8 seconds from 25km/h.

ANSWER :–

GIVEN :–

• Acceleration(a) = 1.2 m/s

• Initial velocity(u) = 25 km/hr = 25 × 5/18 m/s = 125/18 m/s

• Time = 8 sec.

TO FIND :–

• Final velocity(v) = ?

SOLUTION :–

• We know that –

⇒ v = u + at

• Put the values –

⇒ v = 125/18 + (1.2)(8)

⇒ v = 125/18 + 9.6

⇒ v = 6.9 + 9.6

⇒ v = 16.5 m/s

⇒ v = 16.5 × (18/5) km/h

⇒ v = 59.4 km/h

Explanation:

Answer 2

$\huge \underline{ \underline{ \green{ \rm{Gɪᴠᴇɴ: }}}}$

• Acceleration(a) = 1.2m/s

• initial velocity(u) = 25 km/h = 25 × 5/18 m/s = 125/18 m/s

• Time = 8 seconds

$\huge{ \underline{ \underline{ \orange{ \sf{to \: find : }}}}}$

• Final velocity(v) = ?

$\huge{ \underline{ \underline{ \blue{ \sf{Sᴏʟᴜᴛɪᴏɴ: }}}}}$

• We know that,

• $\implies \bf\: v = u + at$

$\huge {\underline{ \underline{ \purple{ \sf{Pᴜᴛ \: ᴛʜᴇ \: ᴠᴀʟᴜᴇs : }}}}}$

$\begin{gathered} : \implies \sf \: v= \frac{125}{18} + (1.2)(8) \\ \\ \\ :\implies \sf v= \frac{125}{18} + 9.6 \\ \\ \\ : \implies \sf \: v=6.9 + 9.6 \\ \\ \\ : \implies \sf \: v=16.5 \frac{m}{s} \\ \\ \\ : \implies \sf \: v=16.5 \times ( \frac{18}{5} ) \frac{km}{h} \\ \\ \\ : \implies{ \underline{ \boxed{ \pink{ \rm{v=59.4 \frac{km}{h} }}}}}\end{gathered}$