Kinematics Trivia Quiz: Speed,Velocity, And Acceleration!

Explanation
The car moves with a constant speed of 10 m/s because it covers a distance of 3 km in 5 minutes. To find the speed, we can convert the distance to meters by multiplying it by 1000 (1 km = 1000 m). So, the car covers a distance of 3000 m in 5 minutes. To find the speed, we divide the distance by the time taken, which gives us 3000 m / 300 s = 10 m/s.

Explanation
The average speed of the journey can be calculated by dividing the total distance traveled (800 km) by the total duration of the journey (20 hours). 800 km / 20 hours = 40 km/h.

Explanation
The distance travelled by the airplane can be calculated by multiplying its speed by the time taken. As the speed is given as 150 m/s and the time is given as 2 minutes, we need to convert the time to seconds before calculating the distance. Since there are 60 seconds in a minute, 2 minutes is equal to 2 * 60 = 120 seconds. Therefore, the distance travelled by the airplane is 150 m/s * 120 s = 18000 meters, which is equivalent to 18 kilometers.

Explanation
Lia runs at a constant speed of 4 m/s. To find the distance he will cover in 1 hour, we need to convert the speed from meters per second to kilometers per hour. There are 3600 seconds in 1 hour, so we multiply the speed by 3600 to get the distance in meters per hour. Then, we divide the distance by 1000 to convert it to kilometers. Therefore, Lia will cover a distance of 14.4 km in 1 hour.

Explanation
Since the car is at rest, it means that it is not moving. Therefore, its speed is 0 m/s.