Answer:
7142.86W
Explanation:
Given parameters:
Work done by brake = 40000J
Time taken = 5.6s
Unknown:
Power used by car = ?
Solution:
Power can be defined as the rate at which work is done. It is mathematically expressed as;
Power =
Now input the variables;
Power = = 7142.86W
<span>Spring tides have higher high tides and lower low tides when the moon, sun, and earth are aligned in a row. Why does this occur?
A.gravitational pull is stronger
</span>
Answer:<em> inversely proportional to </em>
The work relates the displacement and Force
W = F. d Joules
Where W= work,
F = Force ,
d = displacement of object
From the above equation
<em> force and displacement are inversely proportional </em> and work and force are directly proportional
The correct answer is
D.
unbalanced forces
In fact, according to Newton's second law, unbalanced forces acting on an object will accelerate the object:
where the term on the left is the resultant of the forces acting on the object, m is the object's mass, and a is its acceleration.
If there are unbalanced forces acting on the object, the acceleration of the object a is different from zero: this means that the object will change its speed or its direction, or it can also stop moving if the direction of the force is opposite to that of the motion.
2 gram of iron is heavier than 2 gram of a floating boat.