Answer:
7.61 m/s backwards
Explanation:
Initial momentum = final momentum
0 = (880 kg) v + (12.4 kg) (540 m/s)
v = -7.61 m/s
The cannon's recoil is 7.61 m/s backwards.
Answer:
Explanation:
When physical pendulum is a system of rod and sphere then we will have
so we will have
so we will have
since mass of ball is much higher than the mass of rod
so we have
now when we use the rod as physical pendulum then we have
M = 0
so we have
so its time period is given as
D. Gravitaional pulls from unseen galaxies, your correct.
Explanation is in the file
tinyurl.com/wpazsebu
Initially, when the block is at rest on the horizontal surface, two forces act on the block:
- its weight (3.00 N) acting downward
- the vincular reaction of the surface, acting upward and with same magnitude of the weight (3.00 N)
After the force of the vertical string starts to act on the block, three forces act on the block:
- its weight (3.00 N) acting downward
- The tension of the string, acting upward a force of 1.00 N
- the vincular reaction of the surface, acting upward but with less intensity than before: in fact, it counterbalances the net force acting upward, which is now (1.00N-3.00 N=-2.00 N), so the vincular reaction now is 2.00 N.