If a girl runs around a circular track of length 400m and comes back to
the initial point in 40s, what would be her speed and velocity.
7 point
O speed 25m/s,velocity 10
O speed 29m/s, velocity o
speed 10m/s, velocity 0
O speed 10m/s, velocity 10
Answers
Explanation:
Given:→
➳ Length of circular path = 400m
➳ Girl comes to the initial position after 40s.
To.Find→
•Speed
•Velocity
Conceptused:→
➨ Speed is defined as the ratio of total distance travelled to the total time taken.
➨ Velocity is defined as the ratio of displacement to the time.
➨ Distance is defined as the actual length of path which is covered by moving body (scalar).
➨ Displacement is defined as the shortest distance b/w initial and final position of entire journey (vector).
Calculation→
➱speed of Girl :
⇒ Speed = Distace/time
⇒ Speed = 400/40
⇒ Speed = 10m/s✓
➱Velocity of Girl :
⟶ Here, Displacement of girl will be zero because she comes to the initial position after the given interval of time.
➢ Velocity = Displacement/time
➢ Velocity = 0/40
➢ Velocity = 0 m/s
question
a girl runs around a circular track of length 400m and comes back to
the initial point in 40s, what would be her speed and velocity.
7 point
O speed 25m/s,velocity 10
O speed 29m/s, velocity o
speed 10m/s, velocity 0
O speed 10m/s, velocity 10
Answer
velocity = 0 m/s
speed = 10 m/s
She comes back to the initial point so displacement is 0 m.
and velocity = displacement / time = 0 / 40 = 0 m/s
and speed is total distance / time which is 400 / 40 = 10 m/s
c)speed 10m/s, velocity 0✔