F=ma
We know from this that a=10,000m/s2
V=at
X=vt
You end up with v^2=ax
Plug in 10,000 and 0.04 and solve for v =20m/s
Answer:
Physics is a brand of science that deals with nature, matter, and energy. Physics is used in the everyday world because we have simple objects such as levers that use physics. we also have Newton's law of transportation that manipulate everyday objects making them move, so without physics many objects wouldn't move.
The overall change in velocity is just 20m/s.
Answer:
0·95
Explanation:
Given the combined mass of the rider and the bike = 100 kg
Percent slope = 12%
∴ Slope = 0·12
Terminal speed = 15 m/s
Frontal area = 0·9 m²
Let the slope angle be β
tanβ = 0·12
As it attains the terminal speed, the forces acting on the combined rider and the bike must be balanced and therefore the rider must be moving download as the directions of one of the component of weight and drag force will be in opposite directions
The other component of weight will get balance by the normal reaction and you can see the figure which is in the file attached
From the diagram m × g × sinβ = drag force
Drag force = 0·5 × d ×
× v² × A
where d is the density of the fluid through which it flows
is the drag coefficient
v is the speed of the object relative to the fluid
A is the cross sectional area
As tanβ = 0·12
∴ sinβ = 0·119
Let the fluid in this case be air and density of air d = 1·21 kg/m³
m × g × sinβ = 0·5 × d ×
× v² × A
100 × 9·8 ×0·119 = 0·5 × 1·21 ×
× 15² × 0·9
∴
≈ 0·95
∴ Drag coefficient is approximately 0·95