Answer:
The answer is B.
Explanation:
I meant B. not C so sorry
Answer:
The answer is "
"
Explanation:
Given:

Using formula:

= system initial and final linear momentum.
= system original and final linear pace.
= original weight of the car freight.
= car's maximum weight

Answer:

Explanation:
Given:
mass, m = 87.5kg
Velocity, V = 0.900c
now,
the relativistic kinetic energy id given as:
...........(1)
where,
= relativistic factor, given as; 
Now, the classical kinetic energy is given as:
..........(2)
Dividing the equation (1) by (2) we get

or

substituting the values in the equation we get,

or

Answer: 3) There are many possible elements, and they are all in the same vertical column as bromine.
Explanation:
Answer:
The frictional force acting on the bear during the slide is 207.5 N
Explanation:
Given;
mass of beam, m = 25-kg
vertical height, h = 12 m
speed of fall, v = 6 m/s
Change in potential energy of the beam:
ΔP.E = -mgh = - 25 x 9.8 x 12 = -2940 J
Change in kinetic energy of the beam:
Δ K.E = ¹/₂mv² = ¹/₂ x 25 x (6)² = 450 J
Change in thermal energy of the system due to friction:
ΔE = - (ΔP.E + Δ K.E)
ΔE = - (-2940 J + 450 J)
ΔE = 2940 J - 450 J = 2490 J
Frictional force (in N) acting on the bear during the slide:
F x d = Fk x h = ΔE
Where;
Fk is the frictional force
Fk = ΔE/h
Fk = 2490J / 12m
Fk = 207.5 N
Therefore, the frictional force acting on the bear during the slide is 207.5 N