Answer:
C) is zero
Explanation:
According to the law of energy conservation, the total mechanical energy of the object is conserved. A book falling a distance d would have a change in potential energy, resulting in the same change in kinetic energy. But the total mechanical energy must be the same. So there's 0 change in total energy of the system.
Answer:
f = 207.85 N
Explanation:
given,
mass of box = 30 kg
angle made with the horizontal = 30.0∘
Horizontal force = 240 N
now calculating normal force
N = F_y + mg
N = F sin θ+ mg
N = 240 sin 30.0∘ + 30 × 9.8
N = 414 N
Now
frictional force = F _x
f = F cos θ
f = 240 × cos 30.0∘
f = 207.85 N
frictional force acting on the box is 207.85 N
Answer:
i think it's either force or time
Explanation:
just a random guess, but i think one of those are right
The force exerted by student A with his scooter is 306 N and that of student B is 204 N.
<h3>
Force applied by each student</h3>
The force exerted by each student is calculated from Newton's second law of motion.
F = ma
where;
- m is mass
- a is acceleration
F(A) = 127.5 x 2.4
F(A) = 306 N
F(B) = 120 x 1.7
F(B) = 204 N
Thus, the force exerted by student A with his scooter is 306 N and that of student B is 204 N.
Learn more about force here: brainly.com/question/12970081
#SPJ1
