Answer:
The unit of speed is m/s.
No, we can't say force is useful or harmful. All else being equal, force is either not harmful or useful depending on the body that is applying it and where it is applying it.
Given how it affects motion, force is a crucial idea. It is a relationship that, in the absence of an opposing force, modifies an object's motion. However, a push or a pull that any object feels is the simplest definition of force. Due to the fact that force is a vector quantity, it possesses both a magnitude and a direction.
How force is useful
A body at rest can move with enough force.A body in motion may be slowed down or stopped by it.It has the power to quicken the pace of an object in motion.Along with its shape and size, it can also alter the direction of a moving body.
How force is harmful
- Force has the power to alter an object's state of motion.
- Moving objects can shift direction due to force.
- Moving things' speeds can be increased by force.
- Moving items can become slower due to force.
- Force has the power to alter an object's shape.
Learn more about force here
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The answer would be Conduction
Answer:
686.11 N
1.7733 gallons
Explanation:
= Efficiency = 30%
V = Volume of gasoline
E = Energy content of gasoline = 
F = Force
s = Displacement = 108000 m
v = Velocity
Work done is given by
The force required to keep the car moving at a constant speed is 686.11 N
Here the force is directly proportional to speed
The gallons that will be used is 1.7733 gallons
Answer:
Explanation:
initial velocity, u = 0
final velocity, v = 18 m/s
time = 20 sec
acceleration, a = v - u / t
= 18 - 0 / 20
= 18 / 20
= 9 / 10
= 0.9 m/s^2
Hope this helps
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