temperature decreases at higher altitudes because as air rises the pressure decreases.
Answer:
12.24 m/s
Explanation:
Speed: This can be defined as the rate of change of distance with time. The S.I unit of speed is m/s.
Using the formula,
a = v/t................ Equation 1
Where a = acceleration of the sprinter, v = speed of the sprinter, t = time.
making v the subject of the equation,
v = at ................. Equation 2
Given: a = 5.1 m/s², t = 2.4 s.
Substitute into equation 2
v = 5.1(2.4)
v = 12.24 m/s.
Hence, the speed of the sprinter = 12.24 m/s
Explanation:
Total displacement = 200 km
Total time taken = 2 hour...
Now...
= 100 kilometers/hour south
Answer:
10v / 7
Explanation:
Using the conservation law of momentum
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
m v - 0.7 m v₁ = ( 0.7 m + m) 0 m/s since the cart stuck together after collision. taken right to be positive and left to be negative
m v - 0.7 m v₁ = 0
- 0.7 m v₁ = -m v
v₁ = -m v / - 0.7 m = 10v / 7
