Question

tart the race at the same time. Viru runs at a speed of 15 km/hr while Manuf runs at a speed of 5 metre second second
Viru and Munaf start
ains at a speed of 5 m/sec.
who will win the race?
ne will Munaf take to complete the race if the distance
How much time will
at a distance of 400m​

Answer 1

Answer:

sorry

Step-by-step explanation:

you question is not understandable

Answer 2

Manuf wins the race.

Given:

1. Viru and Manuf start the race at the same time.
2. Speed of Viru = 15 km/hr = 15 *(5/18) = 4.167 m/s
3. Speed of Manuf = 5 m/s
4. Initial speed of Viru and Manuf = 5 m/s
5. Distance travelled = 400m

To find:

1. Winner of the race = minimum time to complete the race

Answer:

• From the equation of motion,
• $v^{2} -u^{2} = 2as$
• For Viru, 4.167² - 5² = 2*400*a
• a= -0.0095m/s²
• For Manuf as u = v= 5, a=0
• Now, using
• $s=ut +\frac{1}{2} at^{2}$
• Time taken for Viru to complete the race is
• 400 = 5t -1/2 *0.0095t²
• t = 87.36s
• Time taken for Manuf to finish the race is
• t = d/v
• t = 400/5
• t = 80s
• Hence Viru takes more time than Manuf to finish the race.