Climate feedbacks: processes that can either amplify or diminish the effects of climate forcings. A feedback that increases an initial warming is called a "positive feedback." A feedback that reduces an initial warming is a "negative feedback." So I guess it is ?
Answer:
a) = 1.35 10⁴ N
, b) F = 1.35 10⁶ N, c) F / = 100
Explanation:
a) Let's start by calculating the aceleration it takes for the person with a seat belt and air bag to stop, the approximate distance between the floor and the steering wheel is about 50 cm, let's use kinematics to calculate the acceleration
v² = v₀² - 2 a x
0 = v₀² - 2 a x
a = v₀² / 2 x
a = 15² / (2 0.50)
a = 225 m / s²
We calculate the force with Newton's second law
F = m a
F = 60 225
= 1.35 10⁴ N
b) we perform the same calculation for a person without a belt
a = v₀² / 2x
a = 15² / (2 0.005)
a = 22500 m / s²
F = m a
F = 60 22500
F = 1.35 10⁶ N
c) let's calculate the relationship between these two forces
F / = 1.35 10⁶ / 1.35 10⁴
F / = 10²
Answer:
10.284 kgm/s
4.674545 kN
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
m = Mass of baselball
Impulse
Impulse of the baseball is 10.284 kgm/s
Impulse is also given by
The magnitude of the average force exerted by the bat on the ball is 4.674545 kN
To what? You did not put the question.