Answer:
(a)If two objects collide and one is initially at rest, is it possible for both to be at rest after the collision?
No. Because if you have initial momentum P⃗ ≠0 , if both of the objects were at rest after the collision the total momentum of the system would be P⃗ =0 , which violates conservation of momentum
(b)Is it possible for only one to be at rest after the collision?
Yes, that is perfectly possible. It characteristically, happens when both objects are of the same mass. When two objects of the same mass collide and Kinetic energy is conserved (Perfectly Elastic collision) then the two objects interchange velocities.
Answer:We can solve this using the Law of Conservation of Momentum. If both marbles are in our system, the initial momentum should equal the final momentum.
The initial momentum can be solved for as so:
* + =
(0.06)(0.7) + (0.03)(0) = 0.042 [kg * m/s]
So if the system has an initial momentum of 0.042, it should have the same final momentum.
(0.06)(-0.2) + (0.03)() = 0.042
(0.03)() = 0.54
() = 18 [m/s]
Explanation:
Answer:
knife or weapon
Explanation:
that could be dangerous...
1.44Ns
6.3m/s
Explanation:
Given parameters:
Mass of object = 230g = 0.23g
height of fall = 2m
Unknown:
Impulse = ?
velocity on impact = ?
Solution:
We are going to apply one of the equations of motions to solve this problem.
The most appropriate one is:
V² = U² + 2gH
where V is the final velocity
U is the initial velocity
g is acceleration due to gravity as the body falls with aid of gravity = 9.8m/s²
H is the height of fall
since the body was initially at rest, U = O
V² = 2gH
V = √2 x 9.8 x 2 = 6.3m/s
Impulse = mass x velocity = 0.23 x 6.3 = 1.44Ns
learn more:
momentum brainly.com/question/2990238
velocity brainly.com/question/10932946
#learnwithBrainly
