(3) The frictional force exerted by the floor on the box
Answer:
90 degree hope it help :))
Answer:
Explanation:
When two forces acting on a line of action and they are equal in magnitude but opposite it direction, it forms a couple.
Torque is defined as the product of either force and the perpendicular distance between the two forces.
It is a vector quantity.
The net torque is zero, it means the anticlockwise torque is equal to the clockwise torque.
It means they balances each other.
Which of the following pairings are more likely to be held together with the strong nuclear force
Explanation:
1.What does a strong nuclear force do in an atom? It repels electrons from other electrons. It repels protons from other protons. It attracts protons and neutrons.
2.The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes.
3.The strong nuclear force holds most ordinary matter together because it confines quarks into hadron particles such as the proton and neutron. In addition, the strong force binds these neutrons and protons to create atomic nuclei.
Answer:
(2/3) times height collision occur
Explanation:
for ball A
from the kinematic equation
the distance of ball A is
= velocity ( time ) = distance
since ball is at height, the above equation changes as
for ball B
the condition of collision is
xA = xB
(given)
from the kinematic equation
the speed of the ball A is
since initial speed of the ball A is zero
, so
the speed of the ball B is
since
since 
so, (2/3) times height collision occur
