If the required time is measured from 0 then s = t2 - 8t, therefore 9 = t2 - 8t, which can be written as t2 - 8t - 9 = 0
This equation can be factored as (t - 9)(t + 1) = 0
As we are only concerned with a positive time then the answer is when t - 9 = 0, thus t = 9 seconds.
Look for the lightning flash, and count the seconds until the thunder is heard. Every 5 seconds equals one mile of distance. While the light appears almost instantly sound travels at about 1200 fps, or roughly 5 seconds per mile. In metric units the speed of sound in air is approximately 330 m/s so every 3 seconds is roughly equivalent to 1 km.
The straight line distance would be 350 kilometers (3.5 x 100 km). Multiply the measured distance by the scale.
1 Kilosecond equals 1,000 seconds, and 1 Megasecond equals 1,000,000 seconds, so 250 seconds is equal to .250 Kiloseconds, and .0000250 Megaseconds.
In order to translate feet and seconds into feet per second, all you have to do is divide the number of feet by the number of seconds. In this case, the answer is 7.634 ft/s
10 meters in 1.39 seconds equates to approximately 7.2 meters per second.
The distance traveled by the boat can be calculated using the formula Distance = Velocity x Time. Plugging in the values, the distance would be 1.55 m/s x 246 seconds, which equals 380.7 meters.
Jack's speed from t=5 seconds to t=10 seconds is the average speed over that time interval. You can calculate this by finding the total distance traveled during that time period and dividing it by the time taken.
Distance equals speed multiplied by time. For example, speed is 72 km/h and time is 200 seconds or 200/3600=0,0(5) hours, so the distance traveled is 72*0,0(5)=4 kilometers.
S=d/t It's an Equation to show how to calculate the speed which would be the distance the object has traveled divided by the time is traveled for. Here's an Example: My Car traveled 10 miles in 10 hours so my speed would be 1mph as Distance: 10 miles divided by Time: 10 hours gives me 1mph.
Total distance (dtotal) traveled divided by the time (ttotal) it took to do that equals the average speed (savg) for the journey. It might be written like this:dtotal / ttotal = savg
Yes
The student's velocity is 4 meters per second. Velocity is calculated by dividing the distance traveled by the time taken. In this case, 20 meters divided by 5 seconds equals 4 meters per second.
To calculate speed, you divide the distance traveled by the time taken. In this case, the speed would be 30 meters divided by 10 seconds, which equals 3 meters per second. Speed is a scalar quantity, meaning it only has magnitude, not direction.
Assuming t is time, you need to know the distance traveled in time t. Then, divide the distance by time to obtain speed (velocity).
If an object moves from one place to another it has changed its position. For example, distance equals speed x time. If you travel at 3 feet per second for 10 seconds you have traveled 30 feet, or changed position by 30 feet.
A stone falls freely from rest The total distance covered by it in the last second of its motion equals the distance covered by it in the first three seconds How long does the stone remain in air?
To find the speed, divide the distance by the time. In this case, speed = distance / time = 50 meters / 7 seconds, which equals approximately 7.14 meters per second.