Question

Please Help me with this problem
Describe the velocity of three objects you encounter during the day. If you know the numerical value of the velocity write it down. If not, just write an approximation of the velocity including the direction

Answer 1

Answers:

1) I saw a jogger whose velocity was about 3 m/s going straight North.

2) A car passed me at a velocity of almost 45 mles per hour, straight South.

3) I saw a dog chasing a cat. The cat was runing at about 40 km/h, but the dog  barely reached 32 km/h, both 30° North of the East.

Explanation:

• Velocity is a vector and so you must report it using the magnitude and the direction.

• Velocity has units of distance (meter, kilometer, miles, among others) divided by units of time (second, minutes, hours, among others).

• The magnitude of velocity is also called speed, and you calculate speed (average speed) as per the formula Speed = distance / time.

The velocities described above have these meanings:

Velocity                                Magnitude (speed)    units           direction

3 m/s going North                  3 m/s                         m/s             North

45 m.p.h hour, South             45 miles per hour    miles/h      South.

40 km/h 30° North of East     40 km/h                   km/h         30° North of East

40 km/h 30° North of East     35 km/h                   km/h         30° North of East

Remeber, vectors, like velocity, must be describe by its magnitude and direction.