Speed

The video tutorial explains the concept of speed, which is how fast or slow something moves. It uses examples like a slow tortoise and a fast motorbike to illustrate different speeds. The tutorial also discusses how objects require a force to start moving, using a bobsleigh race as an example where the team pushes the sled to initiate motion. The bobsleigh then slides downhill on slippery ice, increasing its speed. The video concludes with a recap of the speed concept.

What is speed?

• How fast or slow something moves

• The force applied to an object

• The time taken to cover a specific distance

• The distance covered in a specific time

Which of the following moves at a high speed?

• A walking person

• A parked car

• A fast motorbike

• A slow tortoise

What is necessary for an object to start moving?

• A force

• A low speed

• A large mass

• A high speed

In a bobsleigh race, what helps the sled to start moving?

• The weight of the sled

• The slope of the track

• A big push from the team

• The design of the sled

What causes the bobsleigh to move faster on the ice?

• The friction of the ice

• The weight of the bobsleigh

• The design of the bobsleigh

• The slippery nature of the ice