Speed Distance Time | Forces & Motion | Physics | FuseSchool

Summary

This video compares the speed of Usain Bolt and a Formula 1 car by calculating their speeds using the formula: speed = distance/time. Usain Bolt's world record 100-meter sprint, completed in 9.58 seconds, gives him a speed of 10.44 meters per second. On the other hand, a Formula 1 car reaches 375 kilometers per hour, which converts to 104.2 meters per second. The video explains how to standardize units to compare speeds and highlights that the F1 car is significantly faster than the fastest human on Earth. It also introduces the formula triangle for calculating speed, distance, and time.

Takeaways

• 😀 Speed is a measure of how far an object travels in a certain amount of time.
• 😀 The formula for speed is: speed = distance traveled / time.
• 😀 Usain Bolt set the world record for the 100-meter sprint in 2009, running 100 meters in 9.58 seconds.
• 😀 Usain Bolt's speed during his world record sprint was 10.44 meters per second.
• 😀 Speed units can be expressed as meters per second (m/s), combining the distance in meters and time in seconds.
• 😀 A Formula 1 car can travel at 375 kilometers per hour.
• 😀 To compare speeds, both need to be in the same units. Converting kilometers per hour (km/h) to meters per second (m/s) is necessary.
• 😀 After conversion, a Formula 1 car's speed is 104.2 meters per second.
• 😀 The Formula 1 car is significantly faster than Usain Bolt when speeds are compared in the same units.
• 😀 Speed calculations can also be rearranged in a formula triangle: speed = distance / time, time = distance / speed, distance = speed * time.
• 😀 The video concludes by reinforcing the idea that a Formula 1 car is faster than even the fastest human on earth.

Q & A

What is speed, and how is it calculated?

Speed is a measure of the distance an object travels in a certain amount of time. It is calculated using the formula: speed = distance traveled / time.

How fast was Usain Bolt during his world record sprint?

Usain Bolt set the world record for the 100-meter sprint in 2009 with a time of 9.58 seconds. His speed was 10.44 meters per second.

What units are used to measure speed?

Speed is typically measured in meters per second (m/s) when using the metric system, with distance in meters and time in seconds.

How fast is a Formula 1 car, based on the provided information?

A Formula 1 car was mentioned as traveling at 375 kilometers per hour (km/h). When converted to meters per second, this equals 104.2 meters per second.

What problem arises when comparing the speeds of Usain Bolt and a Formula 1 car?

The problem is that their speeds are in different units. To compare them, the units must be the same, which is why the Formula 1 car's speed was converted from kilometers per hour to meters per second.

How do you convert kilometers per hour to meters per second?

To convert kilometers per hour to meters per second, multiply the kilometers by 1,000 (to convert to meters) and divide by 3,600 (to convert one hour into seconds).

Why is it important to use the same units when comparing speeds?

Using the same units ensures an accurate and meaningful comparison. Different units could lead to misleading conclusions about which object is faster.

What is the speed of Usain Bolt in kilometers per hour?

To convert Usain Bolt's speed from meters per second to kilometers per hour, multiply 10.44 meters per second by 3.6, which gives a speed of 37.58 kilometers per hour.

What does the formula triangle represent, and how is it used?

The formula triangle represents the relationship between speed, distance, and time. It helps to rearrange the formula depending on what value you are trying to find: speed = distance / time, time = distance / speed, and distance = speed × time.

How can you calculate the speed for a distance of 150 kilometers and a time of 1.66 hours?

To calculate the speed, divide the distance (150 kilometers) by the time (1.66 hours). The speed is approximately 90.36 kilometers per hour.