Answer:
F = 755 N and h = 10.0 m and a = 9.8 m/s 2 and m=? and v = ?
Answer:
Negative acceleration occurs when an object speeds up in the negative direction.
Positive acceleration occurs when an object speeds up in the positive direction.
Explanation:
This might be wrong but I get some points for a answer..
The correct answer to the question is : The ostrich is motion.
EXPLANATION:
As per the question, the momentum of ostrich P = 5400 Kg. Km/hr.
The mass of the ostrich m = 120 Kg.
The momentum of a body is defined as the product of mass with velocity.
Mathematically P = mv.
The velocity of the ostrich v is calculated as -
v = 
= 
= 45 Km/hr
Hence, the ostrich is in motion as it is moving with a velocity of 45 Km/hr.
Explanation:
It is given that,
Speed of the baseball, u = 44 m/s
Speed of the baseball, v = 53 m/s
Mass of the ball, m = 145 g = 0.145 kg
Time of contact between the ball and the bat, t = 2.2 ms = 0.0022 s



F₁ = 2900 N...........(1)



F₂ = 3493.18 N.........(2)
In average vector form force is given by :



Hence, this is the required solution.
Answer:
(C) 16
Explanation:
Given:
The amplitude of first wave (s₁) = 20 mm
The amplitude of second wave (s₂) = 5 mm
Intensity of first wave = Iₓ
Intensity of second wave = 
The intensity associated with a wave depends on the amplitude of the wave.
The intensity (I) is directly proportional to the square of the amplitude (s) of the wave and is expressed as:

Now, the intensities of the two waves are given as:

Dividing both the intensities, we get:

Therefore, the option (C) is correct.