Answer:
The answer to your question is 6 km/s
Explanation:
Acceleration is a change in velocity with respect to time, its units are m/s² or km/h².
Data
vo = 15 km/h
vf = 45 km/h
t = 5 s
Formula
Substitution
a = (45 - 15) / 5
a = 30 / 5
a = 6 km/s
2 act in the opposite direction. To an objects motion, tending to slow it down
Enertia es el answer de tu question
Answer:
Option 3 and 6
Explanation:
If the particle is under the action of only one external force, both its kinetic energy and the velocity must vary.
When the particle is exerted by an external force, then this external force tends to accelerate the particle.
When the particle accelerates, its velocity must vary for that acceleration to occur.
When the velocity of the particle changes then its Kinetic energy must vary with the velocity of the particle.
Answer: 3.02kg
Explanation:
According to the law of conservation of momentum, the sum of momentum of bodies before collision is equal to the sum of momentum of the bodies after collision.
Note that this bodies will move with a common velocity after collision.
Since momentum = mass of a body × its velocity
Let m1 and m2 be the masses of the spheres
u1 and u2 be their velocities
v be their common velocity after collision
Mathematically
m1u1 + m2u2 = (m1+m2)v
From the question, the second sphere is initially at rest i.e u2 = 0m/s and the composite system moves with a speed equal to one-third the original speed of 1st sphere i.e V = u1/3
Substituting this conditions into the formula, we have;
m1u1 + m2(0) = (m1+m2)u1/3
m1u1 = u1/3(m1+m2)
Given m1 = 1.51kg
m1 = 1/3(m1+m2)
m1 = m1/3 + m2/3
m1-m1/3 = m2/3
2m1/3 = m2/3
2m1 = m2
2(1.51) =m2
m2 = 3.02kg
The mass of the second sphere is 3.02kg