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A train moving at 49mph meets and is passed by a train moving at 63mph A passenger in the first train noted that the second train took 4.5 seconds to pass him How long was the second train?
Wiki User
∙ 15y ago
1. If they trains are traveling away from each other he observes the train at a relative velocity of 112 mph (63 + 49) 2. To get the answer we must multiply the velocity times the time. 3. The hardest part about this problem are the units. 4. Convert mph to feet per sec, then multiply times 4.5 sec to get the answer in feet. Answer= 739.2 feet
Wiki User
∙ 15y ago
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What does per second per second mean?
Per second per second or (/s/s) refers to the rate of acceleration. If you are standing still and you increase your speed at a rate of 5 feet per second per second that means after 1 second you'll be moving at 5 feet per second, after two seconds you'll be moving at 10 feet per second, after three seconds you'll be moving at 15 feet per second, and so on. Every second that goes by, 5 more feet per second will be added to your speed. So 5ft/s/s is a rate of acceleration. An easier example to understand, instead of per second per second, is per hour per second. If you are in a car that is standing still and you increase your speed at a rate of 5 miles per hour per second that means after 1 second you'll be traveling at 5 miles per hour. After 2 seconds your speed will have reached 10 mph. After 10 seconds you'll be traveling at 50mph. Each second that goes by you add 5mph to the speed.
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There are 60 nano-seconds in a second. :)
How many Mega- seconds are in a Second?
There is 1 million seconds in a Mega-second.
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How many seconds have passed when the second hand is at 4?
If the second hand began at 12, 1200 seconds would pass in this period, or 20 minutes.
A car accelerates from rest at 2 meters per second per second What is its speed 3 seconds after the car starts moving?
6 meters per second. Explanation: After 1 second = 2 meters per second. After 2 seconds = 4 meters per second. After 3 seconds = 6 meters per second.
How many type of seconds are there?
there was one kind of second. it is called nanoseconds. Usually, it can be seen faster moving than a second in a timer.
Jack can run at 75 meters in 10 seconds how fast is he moving?
Jack is moving at a speed of 7.5 meters per second.
What was the acceleration of that rock that after 4 seconds is moving at 40 meters per second?
If it started at rest, 4x40 is 160 metres per second
If a shoe is dropped from a height of 40m what is its speed after falling for two seconds?
Regardless of the height from which it is falling, (neglecting air resistance) it's speed will be 19.62 metres per second. (Acceleration from gravity is 9.81 metres per second squared, so after 1 second it is moving at 9.81 metres per second and after 2 seconds it is moving at 19.62 metres per second.
How fast would the man be moving if he travels from 10 meters to 0 meters in 5 seconds?
10 metres in 5 seconds or 2 metres per second.
How fast is a car moving if it goes 300 feet in 4 seconds?
75 feet per second; about 50 mph.
A train moving at a speed 49 MPH is passed by a train moving at 63 MPH a man in first train noticed that the second train too 4.5 seconds to pass him how long is the second train?
To find the length of the second train, we can use the formula speed = distance / time. The second train took 4.5 seconds to pass the man, so we can say that the distance it traveled is equal to its length. Therefore, the length of the second train is (speed of the second train) * (time it took to pass) = 63 MPH * 4.5 seconds = 283.5 feet.
How fast is a dot moving if it covers 43 feet in 1.5 sec?
A dot that moves over 43 feet in 1.5 seconds is moving at the rate of 43 feet per 1.5 seconds, or 28.666... (28 2/3) feet per second.
What does per second per second mean?
Per second per second or (/s/s) refers to the rate of acceleration. If you are standing still and you increase your speed at a rate of 5 feet per second per second that means after 1 second you'll be moving at 5 feet per second, after two seconds you'll be moving at 10 feet per second, after three seconds you'll be moving at 15 feet per second, and so on. Every second that goes by, 5 more feet per second will be added to your speed. So 5ft/s/s is a rate of acceleration. An easier example to understand, instead of per second per second, is per hour per second. If you are in a car that is standing still and you increase your speed at a rate of 5 miles per hour per second that means after 1 second you'll be traveling at 5 miles per hour. After 2 seconds your speed will have reached 10 mph. After 10 seconds you'll be traveling at 50mph. Each second that goes by you add 5mph to the speed.
The cheetahs speed averages 70 meters per sec how far does it travel in 5 sec?
If it's moving at 70 meters per second, and it's moving for 5 seconds..Simple math. 70 x 5 = 350 meters in 5 seconds.
