Answered

Looking for trustworthy answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Join our Q&A platform and connect with professionals ready to provide precise answers to your questions in various areas. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

A bus slams on its breaks and goes from 30 km/hr to 15km/hr in 4 seconds. What is its acceleration?

Sagot :

luana
[tex]Formula\ for\ acceleration:\\\\ a=\frac{v_2-v_1}{t}\\\\ v_1=30km\hr\\v_2=15km\hr\\t=4s\\\\ a=\frac{15-30}{4}=\frac{-15}{4}=-3,75\frac{km}{s^2}\\\\Acceleration\ is\ equal\ to\ 3,75{km}{s^2}. \\Bus\ is\ deccelerating.[/tex]

Acceleration is the rate of change of speed.

If the speed is increased then its called acceleration

If the speed is decresed then its a negative acceleration also called deceleration

the formula for calculating acceleration is

[tex] a = \frac{v-u}{t} [/tex]

where a - acceleration

v - final velocity

u - initial velocity

t - time

v - 15 km/hr should be converted to m/s

distance in 1 hour - 15 km

1 hour = 3600 s

1 km - 1000 m

in 3600 s - 15 000 m

in 1 s - 15 000 m / 3600 s = 4.17 m/s


u - 30 km/hr

in 3600 s - 30 000 m

in 1 s - 30 000 m / 3600 s = 8.33 m/s



substituting the values in the equation

[tex] a = \frac{4.17 m/s - 8.33 m/s}{4 s} = \frac{-4.16}{4} [/tex] = -1.04 m/s²

the answer is negative means its deceleration

the acceleration is -1.04 m/s²

Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.