Answer:
B.The force of friction between the block and surface will decrease.
Explanation:
The force of friction is given by
where 
is the coefficient of friction and 
is the normal force.
When the student pulls on the block with force 
at an angle 
, the normal force on the block becomes
and hence the frictional force becomes
.
Now, as we increase , 
increases which as a result decreases the normal force 
, which also means the frictional force decreases; Hence choice B stands true.
<em>P.S: Choice D is tempting but incorrect since the weight </em>
<em> is independent of the external forces on the block. </em>
Answer:
It depends on whether it is a white light that hits the prison.
Explanation:
If the light from the laser is not white then he wont be able to see all seven colours because it is only a white light that absorbs other colours and when it hits the prism it will refract and therefore he will see all seven colours
<em>The answer you are looking for is: </em>
<em><u>A.) Transfer energy by vibrating particles of matter </u></em>
<em>Hope that helps/!!! </em>
<em>Have a wonderful day!!! </em>
The answer is +50Ns,
Impulse equals force (final time – initial time)
impulse = f * Δt
I = is a symbol for an impulse.
F = is a symbol for an object's force.
t = denotes the passage of time.
Due to the fact that the impulse is a measurement of how much the momentum alters as a result of a force acting on it over time. Derivation of Impulse: Impulse = p = p final - p initial .P refers to the momentum change.the final momentum is denoted by p final.the initial momentum is denoted by p initial .The formula's connection between impulse and an object's change in momentum is its most notable feature. Additionally, impulse can be measured in either kilogram meters per second (kg m/s) or Newton second.
Learn more about impulse here :-
brainly.com/question/2193212
#SPJ4
