A car traveling with constant speed travels 150 km in 7200 s. what is the speed of the car?

Asked by maham237 @ 28/11/2020 in Physics viewed by 492 People

Express the speed to two significant figures and include the appropriate units

Answered by maham237 @ 28/11/2020

The speed of the car is 75 km/h

Further explanation

These are the formulas that we have to remember before solving the problem.

Speed is the rate of change of distance.

$\large { \boxed {v = \frac{d}{t}}}$

v = speed ( m/s )

d = distance ( m )

t = time ( s )

Acceleration is the rate of change of velocity.

$\large { \boxed {a = \frac{\Delta v}{t}}}$

a = acceleration ( m/s² )

Δv = change in speed ( m/s )

t = time ( s )

Let us now tackle the problem!

Given:

distance = d = 150 km

time taken = t = 7200 s = 2 hours

Unknown:

velocity = v = ?

Solution:

$v = \frac{d}{t}$

$v = \frac{150}{2}$

$\large {\boxed {v = 75~km/h} }$

The acceleration of the car is 0 m/s² because it travels with constant speed.

We could also plot the distance vs time graph as shown in the attachment.

Learn more

Velocity of A Runner : brainly.com/question/3813437
Kinetic Energy : brainly.com/question/692781
Acceleration : brainly.com/question/2283922

Answer details

Grade: Middle School

Subject: Physics

Chapter: Kinematics

Keywords: indycar top speed of a fastest police car has ever gone

A car travels 30 km at a uniform speed

Asked by admin @ 17/08/2021 in Physics viewed by 344 persons

A car travels 30 km at a uniform speed of 40 km per hour and the next 30 km at a uniform speed of 20km per hour find its average …

A car travels up a hill at a constant speed

Asked by admin @ 04/08/2021 in Science viewed by 331 persons

A car travels up a hill at a constant speed of 40 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the average speed for …

A train travels 180 km at a uniform speed

Asked by admin @ 13/08/2021 in Math viewed by 324 persons

A train travels 180km at a uniform speed. If the speed had been 9km/hr more, it would have taken 1 hour less for the same journey. Find the speed of …

A driver of a car travelling at 52 km

Asked by admin @ 13/08/2021 in Biology viewed by 287 persons

A driver of a car travelling at 52 kilometre per hour applies the brakes and accelerates uniformly in the opposite direction. the car stops in 5 seconds .another driver going …

A train travels 360 km at a uniform speed

Asked by admin @ 10/08/2021 in Math viewed by 397 persons

A train travels 360 km at a uniform speed. If the speed had been 5 km/h more, it would have taken 1 hour less for the same journey. Find the …

A car traveling 88 km h is 110 m behind

Asked by maham237 @ 05/01/2021 in Physics viewed by 360 persons

a car traveling 95 km/h is 110m behind a truck traveling 75km/h. How long will it take the car to reach the truck?

A driver of a car travelling at 52 km h

Asked by admin @ 03/08/2021 in Science viewed by 531 persons

A driver of a car travelling at 52 km h-' applies the brakes and accelerates uniformly in the opposite direction. The car stopsin 5 s. Another driver going at …

A car travels half the distance with constant velocity

Asked by admin @ 17/08/2021 in Physics viewed by 281 persons

A car travels half of the distance with constant velocity 40km/h and another half with a constant velocity of 60km/h along a straight line. Find the average velocity of the …

A motorist travel to a place 150 km away

Asked by admin @ 20/08/2021 in Math viewed by 278 persons

A motorist travels to a place 150km away at an average speed of 50km per hour and returns at 30km per hour. His average speed for whole journey in km …