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3 years ago

Traffic officials indicate, it takes longer to ______ when you drive fast.

Physics

2 answers:

Lyrx [107]3 years ago

8 0

Answer:

Stop

Explanation:

when we drive fast it will be take longer time to stop.

As car is moving fast the acceleration will be to decelerate we have to apply brake.

By applying brake the car decelerates very fast as deceleration is the change in velocity per unit time. change in velocity is very high so deceleration will be high.

when the brake is applied the distance travel by the high speed vehicle will be more than the vehicle moving at slow speed.

nignag [31]3 years ago

7 0

The answer in the blank is that it is difficult to accelerate at decelerate the vehicle when it is on a fast speed because having a fast speed makes it difficult to adjust the meter as well as if you try to decelerate the vehicle, it could burn out the tires and engine as it is in the fast speed, in accelerating it, it could also be complicated because it would only make the car faster enough that you may no longer control of how to stop it.

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The force of attraction between m1 and m2 is 26 N. What will this force become if m2 is tripled?

Nutka1998 [239]

In order to determine the effect, we will first consider the mathematical expression of Newton's law of gravitation:
F = (Gm₁m₂)/r², where G is the gravitational constant, m represents the mass of a body, and r is the separation between the two bodies.
It is visible that the force is directly proportional to the product of the two masses. Therefore, if one mass is kept constant and the other is tripled, the force will also triple. Thus, the force will be:
26 * 3
= 78 Newtons

4 0

4 years ago

Two cars start a race with initial velocity 7ms-1 and 4ms-1 respectively.Their acceleration are 0.4ms-2 and 0.5ms-2 respectively

Ronch [10]

The distance of the track is 600 m

Explanation:

The two cars move by uniformly accelerated motion, so we the distance they cover after a time t is described by the following suvat equation

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

where

u is the initial velocity

a is the acceleration

For car 1, we have

$d_1 = u_1 t + \frac{1}{2}a_1 t^2$

where

$u_1 = 7 m/s$ is the initial velocity of car 1

$a_1 = 0.4 m/s^2$ is the acceleration of car 1

So the equation can be rewritten as

$d_1 = 7t + 0.2t^2$

For car 2, we have

$d_2 = u_2 t + \frac{1}{2}a_2 t^2$

where

$u_2 = 4 m/s$ is the initial velocity of car 2

$a_2 = 0.5 m/s^2$ is the acceleration of car 2

So the equation can be rewritten as

$d_2= 5t + 0.25t^2$

The two cars finish the race at the same time: this means that they cover the same distance in the same time t, so we can write

$d_1 = d_2\\7t + 0.2t^2=5t + 0.25t^2$

And solving for t, we find

$2t - 0.05t^2= 0\\t(2-0.05t)=0$

Which gives two solutions:

t = 0 (initial instant)

t = 40 s

Therefore, the distance of the track is

$d_1 = 7t +0.2t^2 = 7\cdot 40+0.2\cdot 40^2=600 m$

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

7 0

4 years ago

3. A ball is dropped from the roof of a building 55 meters tall. What is the approximate time of fall?

ladessa [460]

Answer:

3.35 seconds

Explanation:

Use one of the equations of accelerated motion:

Δd = v1Δt+1/2aΔt^2

and rearrange for Δt which is time

Δt = √(2Δd)/a

now we can substitute in the values

a= 9.8 (acceleration due to gravity) and Δd= 55 as that is the height of the building

Δt = √(2*55)/9.8

Δt = 3.3503s

8 0

2 years ago

Which type of curved mirror uses its inside as the reflecting surface? A. a convex mirror B. a plane mirror C. a virtual mirror

ser-zykov [4K]

D. a concave mirror

6 0

3 years ago

Read 2 more answers

Which hormone is released in response to daily variations in light and tends to rise as night falls, peaks at midnight, and fall

hram777 [196]

Melatonin is a hormone being produced by small gland in the brain called pineal gland that helps control sleep and wake cycles. It is also called the sleep hormone because it gives signal that it’s time to sleep. People also used this hormone to adjust the body’s internal clock. It is the hormone that released in response to exposure to sunlight. When the sun sets and night falls, the pineal is activated and begins to vigorously produce melatonin. The amount of melatonin tends to rise as night falls, peaks at midnight, and falls again as the sun rises. It means that it produced more when darker and when the lighter it is; the less melatonin is produced.

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4 years ago