Imagine a Rip-van-Winkle type who lives in the mountains. Just before going to sleep he yells "WAKE UP" and the sound echoes off
1 answer:
You might be interested in
Answer:
Explanation:
Distance between ship and enemy ship
= 500 + 610
= 3110 m
Range of projectile
R = u² sin2θ / g
= (250x 250 sin 150) / 9.8
= 3188m
The projectile falls within a distance of 3188 - 3110 = 78 m from enemy ship
Height of mountain = 1800 m
We shall find the height of projectile when its horizontal displacement is 2500m
x = 2500 , y = ?
u = 2500 ,
y = x / cos θ - .5 g x² /u²cos² θ
9660 - 7315 m
= 2345 m
It is within 545 m from mountain peak .
<em>There is not enough data to solve the problem, but I'm assuming the initial height as h = 10 m for the question to have a valid answer and the student can have a reference to solve their own problem</em>
Answer:
(a)
(b)
Explanation:
<u>Change of Momentum</u>
The momentum of a given particle of mass m traveling at a speed v is given by
When this particle changes its speed to a value v', the new momentum is
The change of momentum is
Defining upward as the positive direction, we'll compute the change of momentum in two separate cases.
(a) The initial height of the superball of m=61.6 gr = 0.0616 Kg is set to h= 10 m. This information leads us to have the initial potential energy of the ball just after it's dropped to the floor:
This potential energy is transformed into kinetic energy just before the collision occurs, thus
Solving for v
This is the speed of the ball just before the collision with the floor. It's negative because it goes downward. Now we'll compute the speed it has after the collision. We'll use the new height and proceed similarly as above. The new height is
The potential energy reached by the ball at its rebound is
Thus the speed after the collision is
The change of momentum is
(b) If the putty sticks to the floor, then v'=0