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astraxan [27]
3 years ago
5

SHOULD YOU TRY TO KEEP A "SPACE CUSHION" AROUND YOUR VEHICLE WHENEVER POSSIBLE? A. Yes, when another driver makes a mistake, you

will have time to react B. No, space cushions are unnecessary. They take up valuable space on the freeway C. No, someone may try to crowd in front of you D. Yes, but only on city streets
Physics
1 answer:
Veronika [31]3 years ago
3 0

Answer:

A. Yes, when another driver makes a mistake, you will have time to react

Explanation:

Yes it is good to make space cushion between two cars because due to some urgency when front vehicle applied brakes then the driver of the rear car will definitely take some time to react.

This reaction time may be between 0.5 s to 0.8 s for different people

so the rear car will move with same speed for above reaction time and it will cover the cushion distance between two cars

If we will not maintain this cushion distance between two cars then we can see that the two cars will collide and that may cause many accidents

so it is correct statement and correct option would be

A. Yes, when another driver makes a mistake, you will have time to react

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oee [108]

Answer:

that's all I know about workdone calculation s

7 0
4 years ago
Uranus has more than 14 times as much mass as earth, yet the gravitational force is less. how can that be?
Anarel [89]
It has more mass, yes. But it has less of a gravitational pull because it is farther away from the sun than the Earth is
3 0
4 years ago
Read 2 more answers
Examine the scenario.
vovangra [49]

Answer:

acceleration 8 km/h/s south

Explanation:

First of all, let's remind that a vector quantity is a quantity which has both a magnitude and a direction.

Based on this definition, we can already rule out the following two choices:

distance: 40 km

speed: 40 km/h

Since they only have magnitude, they are not vectors.

Then, the following option:

velocity: 5 km/h north

is wrong, because the car is moving south, not north.

So, the correct choice is

acceleration 8 km/h/s south

In fact, the acceleration can be calculated as

a=\frac{v-u}{t}

where

v = 40 km/h is the final velocity

u = 0 is the initial velocity

t = 5 s is the time

Substituting,

a=\frac{40 km/h-0}{5 s}=8 km/h/s

And since the sign is positive, the direction is the same as the velocity (south).

7 0
4 years ago
Li is riding her bicycle at 8.0 m/s. She slows down to 4.0 m/s. Her change in velocity is m/s. If Li takes 2 seconds to make thi
forsale [732]
You will have to use this formula:
v = vo + a \times t

Final Velocity (V) = 4m/s
Initial Velocity (Vo) = 8m/s
Acceleration (a) = ? m/s^2
Time (t) = 2 secs

Then:

-> 4 = 8 + a x 2
-> 4 - 8 = 2a
-> -4 = 2a
-> a = -4/2
-> a = -2 m/s^2

Ps: It's value is negative because the she was in retrograde motion.

Answer: Her acceleration is -2 m/s^2.
4 0
4 years ago
Read 2 more answers
A scuba diver wears weights as well as a buoyancy compensator to establish neutral buoyancy while diving. The buoyancy compensat
katrin [286]

Answer:

With more air is more buoyancy. When deflated or released the scuba diver is less buoyant.

Explanation:

The compensator is a Buoyancy control device that has an inflatable air bladder.When we have more air out into the inflatable bladder, then one is more buoyant. If the air is released from the bladder, then one is less buoyant. We add air through an air inflation valve. Air is also then released using air-deflation valves.

Buoyancy can be defined as an upward force which is exerted on an object that is fully or partially immersed in water

when one is less buoyant than water, it means that the upward pressure is more than the downward pressure of that person and his equipment. Then he will float. In a case of negative buoyancy, we have downward pressure of this person and his equipment to be more than the upward pressure of the water. Then sinking will happen.

4 0
3 years ago
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