PHYSICS - Forces - Speed Distance Time

The video explores the concept of speed by comparing Usain Bolt's sprinting speed to that of a Formula One car. It explains how to calculate speed using the formula: speed equals distance divided by time. Usain Bolt's speed is calculated as 10.44 meters per second, while the Formula One car's speed is converted from 375 kilometers per hour to 104.2 meters per second. The video emphasizes the importance of using consistent units for comparison and introduces the formula triangle for calculating speed, distance, and time. Practice questions are provided to reinforce the concepts.

What is the formula to calculate speed?

• Speed equals distance divided by time

• Speed equals time divided by distance

• Speed equals distance multiplied by time

• Speed equals time multiplied by distance

How fast did Usain Bolt run during his world record 100-meter sprint?

• 11.22 meters per second

• 9.58 meters per second

• 10.44 meters per second

• 12.34 meters per second

Why can't we directly compare the speeds of Usain Bolt and a Formula One car initially?

• Because they travel different distances

• Because their speeds are in different units

• Because they start at different times

• Because they have different speeds

What is the speed of a Formula One car in meters per second after conversion?

• 150 meters per second

• 100 meters per second

• 375 meters per second

• 104.2 meters per second

Which formula represents the relationship between distance, speed, and time?

• Distance equals speed multiplied by time

• Speed equals distance multiplied by time

• Time equals speed divided by distance

• Distance equals speed divided by time