Answer:
Explanation:
Impulse-momentum theorem states that impulse is equal to the change of momentum:
(1)
with pf the final momentum and pi the initial momentum. Knowing that momentum is mass (m) times velocity (1) is:
It's important to note that we're dealing with vector quantities so direction matters. If we choose towards the floor positive direction then the initial velocity is positive and the final velocity is negative, so:
So, the impulse delivered to the floor is
The answer is False. Permafrost does not thaws briefly in the summer since Permafrost is all year round. As global temperature rise, the amount that frozen soil that melts is increasing. With warmer temperature, snow and ice that used to reflect sunlight is disappearing. Thus, the newly exposed soil absorbs heat from the sunlight, and encourages melting.
Answer:
The answer is t=4 + t=3=t=7
Answer:
a) 20 m/s
b) No
Explanation:
a)
Mr. G needs to run x= 200 m in t = 10 seconds to catch the bus.
Knowing the speed is computed as
We have
b)
The fastest human can run 12 m/s, so Mr. G won't be able to catch the bus because he needs to run faster than that
Answer:
Explanation:
We can use equation of motion to solve this
