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3 years ago

If a car accelerates at a uniform 4.0 m/s, how long will it take to reach a speed of 36.0 m/s,

Physics

1 answer:

11111nata11111 [884]3 years ago

5 0

Answer:

Explanation:

v=u+at

36=0+4t

t=36-0/4

t=9s

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What is the sig fig of 0.00324?

Nonamiya [84]

This number has 3 sig figs.

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3 years ago

A biker first accelerates from 0.0 m/s to 6.0 m/s in 6 s, then continues at this speed for 5 s. What is the total distance trave

Svetradugi [14.3K]

Answer:

48m

Explanation:

Given the following data;

Initial velocity = 0m/s

Final velocity = 6m/s

Time, t = 6 secs

Time, T2 = 5 secs

Mathematically, acceleration is given by the equation;

$Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}$

Substituting into the equation;

$a = \frac{6 - 0}{6}$

$a = \frac{6}{6}$

Acceleration, a = 1m/s²

To find the distance covered in the first phase;

Solving for distance, we would use the second equation of motion;

$S = ut + \frac {1}{2}at^{2}$

Substituting the values into the equation;

$S = 0(6) + \frac {1}{2}*1*(6)^{2}$

$S = 0 + \frac {1}{2}*1*36$

$S = 0.5 *36$

Distance, S1 = 18m

For the second phase, time T2 = 5 secs;

Mathematically, speed is given by the equation;

$Speed = \frac{distance}{time}$

Making distance the subject of formula, we have;

$Distance, S = speed * time$

Substituting into the above equation;

$Distance, S = 6 * 5$

Distance, S2 = 30m

Total distance = S1 + S2 = 18m + 30m = 48m

Total distance = 48m

Therefore, the total distance traveled by the biker is 48m.

4 0

3 years ago

What is the mass of a 3,500-N rock?

Viktor [21]

350kg because to get Newton’s it’s mass x Gravity, earths gravity is x10 so 3500 divided by 10 is 350

6 0

3 years ago

An elevator is being lowered at steadily decreasing speed by a steel cable attached to an electric motor. There is no air resist

shtirl [24]

Answer:

F = W + ma a> 0

Explanation:

For this exercise let's use Newton's second law

we assume the upward direction as positive

F - W = m a

F = W + ma

F = m (g + a)

In this case they indicate that the speed is less and less as it goes down, therefore the acceleration must be opposite to the speed, that is, the acceleration is upwards, consequently it is positive

We can see that since a> 0 the force F must have greater than the weight of the elevator

6 0

2 years ago

Read 2 more answers

Calculate the momentum of a 4 kg Bolling ball being thrown at a speed of 3 m/s

bonufazy [111]

We are given –

Mass of boiling ball is, m = 4 kg
Speed is, v = 3 m/s
Momentum, P =?

As we know –

↠Momentum = Mass × Speed(Velocity)

↠Momentum = 4 × 3 kgm/s

↠Momentum = 12 kgm/s

Henceforth,Momentum will be 12 kgm/s.

7 0

2 years ago