Question

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Answer 1

Answer:

Answer:

Given :-A car with a mass of 800 kg moves at a speed of 60 km/h.The movement evenly accelerated and lasted 20 seconds.To Find :-What is the force.Formula Used :-

\boxed{\bold{\large{v\: =\: u\: +\: at}}}v=u+at

\boxed{\bold{\large{Force\: =\: m \times a}}}Force=m×a

where,

v = Final velocityu = Initial velocitya = Accelerationt = TimeF = Forcem = MassSolution :-

❶ First, we have to find the acceleration,

Given :

✦ Final velocity = 60 km/h = 60 km/s = 60 \times \dfrac{5}{18}60×185 m/s = 16.67 m/s

✦ Initial velocity = 0 m/s

✦ Time = 20 seconds

According to the question by using the formula we get,

⇒ 16.67 = 0 + a × 20

⇒ 16.67 = 20a

⇒ \dfrac{16.67}{20}2016.67 = a

⇒ 0.84 = a

➠ a = 0.84 m/s

❷ Now, we have to find the force,

Given :

✦ Mass = 800 kg

✦ Acceleration = 0.84

According to the question by using the formula we get,

➟ Force = 800 × 0.84

➥ Force = 672 N\therefore∴ The force of a car is 672 N .

Answer 2

Answer:

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