A small car and an SUV are at a stoplight. The car has amass equal to half that of the SUV, and the SUV's engine canproduce a maximum force equal to twice that of the car. Whenthe light turns green, both drivers floor it at the sametime. Which vehicle pulls ahead of the other vehicle after afew seconds?
a) It is a tie.
b) The SUV
c) The car

a) It is a tie

Explanation:

Given

mass of car is half of SUV

if mass of SUV is 2m so the mass of car is m

SUV can produce twice the force of car i.e. 2 F

so acceleration experienced by SUV

acceleration of Car

both start with zero initial velocity therefore after few second they will be having same velocity and share same position.

reserve is the answer

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s