Answer:
17.89 m/s
Explanation:
recall that one of the equations of motion can be expressed as:
v² = u² + 2as,
where
v = final velocity = given as 20 m/s
u = initial velocity = given as 7.0 m/s
a = acceleration. Since it is freefalling downwards, the acceleration it would experience would be the acceleration due to gravity = 9.81 m/s²
s = displacement (we are asked to find)
simply substitute the known values into the equation:
v² = u² + 2as
20² = 7² + 2(9.81)s
400 - 49 = 19.62s
19.62s = 351
s = 351/19.62
s = 17.8899
s = 17.89 m/s
Answer: g= 9,81 m/s^2 ( average value for g in the Earth)
Explanation: The value of g depend on the localization on the Earth for example at the poles g is equal to: 9.83 m/s^2
On the other hand, at the aquator g=9.78 m/s^2
Given:
Momentum of the dog (p) = 120.5 kg m/s
Speed of the dog (v) = 5 m/s
To Find:
Mass of the dog (m)
Concept/Theory:
- It is defined as the quantity of motion contained in a body.
- It is measured as the product of mass of the body and it's speed.
- It is represented by p.
- It's SI unit is kg m/s
- Mathematical Representation/Equation of Momentum:
Answer:
By using equation of momentum, we get:
Mass of the dog (m) = 24.1 kg
The ocean and the sky provide a clean, flat line where the Earth seems to meet the sky. If you're standing on the beach looking out at the sea, the part of the sea that "touches" the horizon is called the offing
