Answer:
Newtons Second Law of Motion
Explanation:
If you think more specifically about energy,such as thermal energy,the amount of that energy a substance has is determined by the movement of the molecules.hope this helps u
Answer:
B
Explanation:
Torque exerted on an object depends upon three things.
1. Moment arm
2. Magnitude of applied force
3. Direction of force
T=r x F
T= r * F sinФ
Let T1 is force due to force applied at mid point of door.
let d is the width of door, so
T1= °) (∴ moment arm =d)
T1= __________(2) (∴ sin 90°=1)
Let T2 is the torque due to force applied at the doorknob.
T2= (∴ moment arm =d)
T2= __________(2) (∴ sin 90°=1)
From equation (1) and equation (2)
2T1=T2
or
T1= T2/2
As T2 is greater so option B is the correct answer.
Answer:
Maximum 13 m overhang
Explanation:
Since the brick is uniform. Its mass must be equally distributed along its length. So the center of mass is in geometric center, which is 26 / 2 = 13 m from each end of the brick.
For the brick to not tip over, its center of mass must NOT be overhung over the edge. It stays just on the edge. So the maximum overhang is 13 m.