I would say the answer is C. Hope I helped ^-^
The baseball of mass 140g travels at a speed of 30 m/s.
Its momentum is
P₁ = (140 x 10⁻³ kg)*(30 m/s) = 4.2 (kg-m)/s
Part a.
The momentum is dissipated in 1.5 s.
The average force, F, that dissipates the momentum is
(F N)*(1.5 x 10⁻³ s) = 4.2 (kg-m)/s
F = 2800 N = 2.8 kN
Answer: 2.8 kN
Part b.
The average force that the baseball exerts on the head is 2.8 kN, as obtained in part a.
This is true if the time to dissipate the momentum is 1.5 ms.
Answer: 2.8 kN
Part c.
Answer:
(a) The forehead will not fracture because 2.8 kN < 6.0 kN.
(b) Your cheek will fracture because 2.8 kN > 1.3 kN
Hey there,
Answer: I know 3 ways
1. Be prepared by practicing as much as you can
2. Limit your sugar intake before the performance - in other words, don't eat too much of sweets before your performance
3. Stop scaring yourself with the thoughts "Something might go wrong"
Hope this helps :D
<em>~Top♥</em>
Answer:
Motaba, a fictional virus which causes a deadly fever, is discovered in the African jungle in 1967.
Explanation:
A researcher states that bines density in women is negatively associated with age, this means above average values of age tend to accompany below average values of bone density. The answer will be A.
