Q&A for How to Calculate Speed

1000 mm is 1 meter, so the speed is 1 meter in 64 sec, which equals 1/64 of a meter in 1 second. 1/64 = 0.016, so the speed is 0.016 meter per second.

1 minute and 36 seconds is 96 seconds. Divide 1.2 miles by 96 seconds: that's 0.0125 mile per second. Multiply that by 3600 to get miles per hour.

1.042 meters per second is faster because it has way more speed than the other. The larger the value of m/s, the faster its speed.

Let's assume the distance is being measured in feet. Speed equals distance divided by time. In this case, the speed equals (x² - 9) / (x - 3) = [(x - 3)(x + 3)] / (x - 3) = (x + 3) feet per second.

Speed equals distance divided by time: 100 km / 2 hours. 100 / 2 = 50 km per hour.

If you want to express the speed in kilometers per second, simply divide 4.3 km by 1.5 seconds. That's 2.86 kilometers per second.

If you multiply 6 seconds by 600, you get 3600 seconds, or 1 hour. So multiply 0.0136 mile by 600 to get 8.16 miles per hour.

15 km in 2 hours is the same as 7½ km in one hour. The speed is 7.5 km/hr.

The total distance traveled is 1325 km. The first leg of the trip lasts from 8:40 p.m. to midnight, or 3 hours and 20 minutes, or 200 minutes. The second leg of the trip lasts from 12:30 a.m. to 6:00 a.m., or 5 hours and 30 minutes, or 330 minutes. So the total travel time (not counting the layover) is (200 + 330) = 530 minutes. Divide 530 by 60 to get 8.83 hours. Then the average speed is 1325 km / 8.83 hours. Divide both numbers in that fraction by 8.83 to get 150.06 kilometers per hour (basically an average speed of 150 km/hr).

Let's assume she runs 15 km. Let x be the time it takes her to run that distance. Set up this proportion: 20 km / 1 hr = 15 km / x hr. Cross-multiply: 20x = (1)(15). So x = 15/20 = 3/4 hr, or 45 minutes.

Let's assume the car travels 100 km in 8 hours and then travels an additional 40 km in 2 hours. The total distance travelled is 140 km, and the total time travelled is 10 hours. The average speed is 140 / 10 = 14 kilometers per hour.

Divide 3 meters by 0.53 to get 5.66 meters per second.

Divide 270 km by 4½ to get 60 kilometers per hour.

Divide 40 m by 1.234 to get 32.41 meters per second.

Divide both the distance run and the elapsed time by 13.63 to find the velocity in meters per second: 100 m / 13.63 = 7.34 meters. 13.63 sec / 13.63 = 1 sec. Your velocity is 7.34 meters per second.

We multiply 45 minutes -- or ¾ of an hour -- by 4/3 to get 1 hour, so multiply 120 km by 4/3 to get 160 km per hour.

He is running at a speed of 1/6 km per minute or approximately 10 km per hour.

Divide both the distance and the time by 6 to get 83.33 meters per minute. Divide them by (6)(60)=360 to get 1.38 meters per second.

We can't calculate it because we don't know where the object began its journey, so we don't know how far it traveled in 2 hours. In addition, don't know where the light source was at the beginning of the 2 hours, so we don't know how far the light traveled to catch the object.

300 / 120 = 2.5 hours (assuming the maximum speed is maintained throughout the entire distance).

Speed is distance travelled divided by time, i.e. mile per hours. In this case, the answer is 315 miles/4.5 hours = 70 miles per hour.

u = 0, t = 100s , displacement = 1 km = 1000m , v= ? s = ut + (0.5)a (t^2) 2000/10000 = a = 2/10 = 0.2 v= u + at = 0 + (0.2)(100) = 20 m/s.

The top speed of the car depends upon how much work the engine can do in one second and the friction coefficient between the tyre and the road.

u=0 displacement (x)=-80m (don't worry!: -ve means its downwards) a=g=-10m/s^2 t=? x = ut + (1/2)a.t^2 -80m = (1/2)(-10)(t^2) m/s^2 (160/10)(s^2) = t^2 t= 4s (since time here can't be -ve) The stone will take 4 seconds to reach the ground (or 4.04 seconds if you take g=9.8 m/s^2).

Speed=Distance travelled/ time so Usain Bolt's speed is 100/9.58=10.438m/s. To convert this to km/hr: (10.438x3600)/1000=37.6km/hr.

Speed= Distance travelled/ time, so the speed of the car is 8.23/3=2.743m/s.

That's the equivalent of 14.77 km/hr.

During those six seconds, he is running at the rate of 8.18 miles per hour.

The average speed is (100 + 40) km / (8 + 2) hrs = 140 / 10 = 14 km/hr.

It's traveling at the speed of 15,381.8 km/hr. To calculate that, divide 33 seconds into 3600 seconds (one hour), and then multiply that quotient by 141 km to get km/hr.