a 150 newton force acts on a 300kg cars calculate how long it takes this force to change the car's velocity from 2m/s to 6m/s
2 answers:
Answer:
8 seconds
Explanation:
The force acting upon the car is capable of increasing the velocity of its total mass by one meter per second for every two seconds the force is acting upon the car.
6 m/s - 2 m/s = 4 m/s increase
To increase the cars velocity by 4 m/s, it is necessary to apply the force for 8 seconds, because each m/s increase in the cars velocity is achieved in two seconds, since the capacity of the force to accelerate mass by one meter per second, per second is exactly half of the force it is acting upon.
I hope that doesn't sound too convoluted!
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They are all units of measure of length
Explanation:
Length is a scalar quantity representing a distance between two points, and it can be expressed in different units.
The SI units of the length is the metre (m), which is defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
A unit which is common used is a multiple of the meter, the kilometre (km) which corresponds to 1000 metres:
1 km = 1000 m
Another unit used in the UK system is the mile (mi), where the conversion factor between miles and metres is
1 mi = 1609.34 m
Finally, these units are not suitable to be used to measure astronomical distances - such as those between stars and galaxies. For this, another unit is used, which is the light-year (ly), which corresponds to the distance travelled by the light in a vacuum in one year, and its conversion factor to the metre is:
Learn more about distance here:
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