Question

1 point
4. Calculate the force exerted
by the motorcar that is moving
with a velocity of 72 km/h and
takes 5 s to stop after the
application of brakes, Mass of
the motorcar along with the
passengers is 800 kg.
​

Answer 1

Answer:

The area of base of a cylindrical vessel is 300 cm?. Water (density = 1000 kg * m ^ - 3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m * s ^ - 2) .

Answer 2

Answer:

$initial \: \: \: velocity = 72kph = u\: \: \: \: \\ convert \: \: it \: \: into \: \: mps = \frac{72 \times 1000}{3600} = 20mps \\ final \: \: velocity = 0 = v \\ mass \: \: \: of \: \: motorcar = 800kg = m \\ time \: \: taken = 5sec = t \\ calculate \: \: acceleration = \frac{v - u}{t} \: = \frac{0 - 20}{5} = - 4mps {}^{2} \\force = mass \times acceleration \\ 800 \times - 4 = - 3200newton \: \: \: ans.$

Hope it will help you.