6m/s2
.
What is the average acceleration of a subway train that speeds up from 9.6 m/s to 12 m s?
1m/s2
.
What is the average acceleration of a subway?
We are given that u=9.6ms−1 and v=12ms−1 . Also, the time in which the velocity changes is given to be 0.8s . Therefore, the average acceleration of a subway train is
3ms−2
.
What is the average acceleration of a runner?
This shows Usain with an average speed of 5.38 m/s at a time of 0.91 seconds and 9.83 m/s at 2.35 seconds. From this, I can calculate the average acceleration (during this interval) to get a value of
3.09 m/s
2
.
What is the average velocity of a train?
Signal speeds
Federal regulators limit the speed of trains with respect to the signaling method used. Passenger trains are limited to
59 mph
and freight trains to 49 mph on track without block signal systems.
What is the average acceleration of a train that speeds up from 9.6m s to 12 m/s in .8 seconds?
3m/s2
.
Why is it more helpful to know a tornado velocity?
Why is it more helpful to know a tornado’s velocity rather than its speed?
Because velocity includes direction
. If we know the tornados velocity we know where it is going and how fast so we can notify people in the tornado’s path to seek shelter.
What is the average acceleration of a subway train traveling north that speeds up from 9.6 m/s to 12 m S in 0.8 seconds down a straight track?
1m/s2
.
What is the maximum acceleration a human can withstand?
Normal humans can withstand
no more than 9 g’s
, and even that for only a few seconds. When undergoing an acceleration of 9 g’s, your body feels nine times heavier than usual, blood rushes to the feet, and the heart can’t pump hard enough to bring this heavier blood to the brain.
What is Max acceleration?
Acceleration is the rate of change of velocity, or how quickly an athlete can increase the velocity of the motion. Maximum speed is the highest rate of speed an athlete can attain.
What is the fastest a human can go without dying?
— Steve in Davis, Calif. So far, the fastest anyone has run is
about 271⁄2 miles per hour
, a speed reached (briefly) by sprinter Usain Bolt just after the midpoint of his world-record 100-meter dash in 2009.
Do trains go faster at night?
Freight trains will sometimes go faster during the nighttime
, the reason is that during the night, there are less passenger trains on the tracks. … While there are not so many passenger trains traveling during the nighttime, freight trains may run with fewer stops.
What is difference between speed and acceleration?
Speed is the distance covered in a unit of time while acceleration is the
rate of change of speed
. … Speed is a scalar quantity while acceleration is a vector quantity. Speed is related to the rate of motion while acceleration is related to the rate of motion as well as the direction of motion.
What is acceleration of a train?
3m/s2
.
How can you tell a tornado is coming at night?
Day or night – Loud, continuous roar or rumble, which doesn’t fade in a few seconds like thunder. Night – Small, bright, blue-green to white flashes at ground level near a thunderstorm (as opposed to silvery lightning up in the clouds). These mean power lines are being snapped by very strong wind, maybe a tornado.
What is difference between speed and velocity?
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, speed is a scalar value, while velocity is a vector. … In its simplest form, average velocity is calculated by dividing change in position
(Δr) by change in time
(Δt).
