Answer:
A) 4.3 m/s
Explanation:
M = mass of the cannon = 1200 kg
m = mass of the cannonball = 100 kg
v = speed of the cannonball after the fire = 52 m/s
V = speed of cannon after fire
Since the cannon and cannonball were at rest before fire, total initial momentum will be taken as 0
Using conservation of momentum
0 = m v - M V
M V = m v
inserting the values
(1200) V = (100) (52)
V = 4.3 m/s
The change in potential energy of an object is given by
where
m is the mass of the object
g is the gravitational acceleration
is the increase in altitude of the object
In our problem,
is the mass of the book,
and
is the increase in altitude of the book, so its variation of potential energy is
Adding both distances together, you get a total of 1800 miles. With the total travel time of 4 hours, you divide the distance traveled by the time it took. so 1800/4=450 mph
Answer:
B)
Explanation:
Negative (-) charge M will not move towards negative (-) charge K because, same charges will not attract each other in the given case
Negative (-) charge at the M tends to move towards positive (+) charge L in the direction of B) because opposite charges attract each other.
What is a projectile give example?
The motion of such a particle is called Projectile Motion. In the above diagram, where a particle is projected at an angle θ, with an initial velocity u.
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Few Examples of Two – Dimensional Projectiles.
