Acar travels 60m in 2 hours. calculate its average speed

30m/hr

Explanation:

The average speed is define as the distance traveled over the time it took traveling that distance.

Now as an equation it looks like this:

Where:

v = average speed

d = distance traveled

t = time traveling that distance

We know that the car traveled 60 m in 2 hours.

d = 60 m

t = 2 hours

So we plug that in our equation:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards