In case of an object sitting at rest on another base, there are two equal and opposite forces – Normal force and the gravity.
Answer: Option A
<u>Explanation:
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When an object is placed at rest position on another object, there is a force exerted by the surfaces of the two contact objects. This force is denoted as Normal Force.
When an object such as a box is placed on a shelf, its surface exerts a contact force on the base of the shelf- The Normal force directed upward. Meanwhile, the gravity stays at its action and tries to pull the box towards itself.
Both of these forces however are equal and opposite and therefore, there is zero net force on the box. That's why it remains at rest, holding on Newton's third law.
Answer with Explanation:
We are given that
Mass of rider=m=77 kg
Mass of bike =m'=7.3 kg
Initial velocity,u=9.3 m/s
Final velocity,v=6 m/s
A.Change in velocity=v-u=6-9.3=-3.3 m/s
Total mass,M=m+m'=77+7.3=84.3 kg
Change in momentum=
B.Impulse=Ft=Change in momentum=-278.19kg m/s
C.Time,t=13.2 s
Using the formula
F=
D.
Answer:
X = 0.6
Explanation:
The resistance of the unknown resistor can be found by using the formula of the Wheatstone bridge:
<u>X = 0.6</u>
Hence, the unknown value of resistance is found to be 0.6 units.
I think it's true
<span>The minimum amount of stimulus energy that a person can detect.
When the energy of a stimulus falls below the absolute threshold, we cannot detect its presence. When the energy of a stimulus rises above it, we can detect the stimulus.
hope it helped give thanks :)
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