Given : A car starts from rest and retains the acceleration of 4m/s² in 20 second. Calculate its final velocity.
Solution : As we know that a car starts from rest so it's initial velocity should be 0 m/s. Acceleration is 4 m/s² and time taken is 20 sec. So, we need to calculate it's final velocity which we can get it usi g the first equation of motion.
First Equation of Motion : v = u + at
Putting all the required values in the formula we will get v
<u>Henceforth, final velocity is 80 m/sec.</u>
5.5 hours. In order to get this answer you divide 137.5 by 25. Hope this helps :)
Answer:
Explanation:
Given:
- mass of aluminium,
- initial temperature of the aluminium cylinder,
- mass of coffee,
- initial temperature of coffee,
- specific heat of coffee (assuming water),
- specific heat of aluminium,
When the coffee and the aluminium cylinder come in contact then heat released by the coffee is equal to the heat gained by the aluminium.
<u>Mathematically:</u>
is the final temperature of agreement.
For marking a no-wake or idle speed area, a circle is used as a marker of regulation. A diamond shape marker indicates danger. Cross-diamond shape markers are the sign of danger areas like dam, swim areas. For displaying any information regarding directions etc, a rectangular marker is used.
Answer:
V = 19m/s
Explanation:
Given the following data;
Initial velocity, U = 4m/s
Acceleration, a = 0.5m/s²
Time, t = 30 seconds
To find the final velocity, we would use the first equation of motion;
V = U + at
Where;
V is the final velocity.
U is the initial velocity.
a is the acceleration.
t is the time measured in seconds.
V = 4 + 0.5*30
V = 4 + 15
V = 19m/s
Therefore, his final velocity is 19 meters per seconds.