Cutting and polishing exposed rock
Acceleration I think if I’m not mistaken
The answer is a. over use of petroleum
The velocity of the rode at the end of the time 4.33 seconds is 42.434 m/s.
<h3>What is velocity?</h3>
Velocity is the rate of change of displacement.
To calculate the velocity of the, we use the formula below.
Formula:
- v = u+gt................. Equation 1
Where:
- v = Velocity at the end of the time
- u = Initial velocity
- g = Acceleration due to gravity
- t = Time
From the question,
Given:
- u = 0 m/s (From rest)
- g = 9.8 m/s²
- t = 4.33 seconds
Substitute these values into equation 1
- v = 0+9.8×4.33
- v = 42.434 m/s
Hence, the velocity at the end of the time is 42.434 m/s.
Learn more about velocity here: brainly.com/question/6504879
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Answer:
v = 98.75 km/h
Explanation:
Given,
The distance driver travels towards the east, d₁ = 135 km
The time period of the travel, t₁ = 1.5 h
The halting time, tₓ = 46 minutes
The distance driver travels towards the east, d₂ = 215 km
The time period of the travel, t₁ = 2 h
The average speed of the vehicle before stopping
v₁ = d₁/t₁
= 135/1.5
= 90 km/h
The average speed of vehicle after stopping
v₂ = d₂/t₂
= 215/2
= 107.5 km/h
The total average velocity of the driver
v = (v₁ +v₂) /2
= (90 + 107.5)/2
= 98.75 km/h
Hence, the average velocity of the driver, v = 98.75 km/h
