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3 years ago

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Physics

1 answer:

Viktor [21]3 years ago

6 0

Answer:

no idea. i thought i meant to click on a diff one

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What is the momentum of a 800 kg car traveling at 20 m/s

BabaBlast [244]

<u>Answer:</u> The momentum of the car is 16000 kg.m/s

<u>Explanation:</u>

Momentum is defined as the force that keeps the object moving. It is also defined as the product of mass and velocity of an object.

Mathematically,

$p=m\times v$

where,

p = momentum of the car = ?

m = mass of the car = 800 kg

v = velocity of the car = 20 m/s

Putting values in above equation, we get:

$p=800kg\times 20m/s\\\\p=16000kg.m/s$

Hence, the momentum of the car is 16000 kg.m/s

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3 years ago

Read 2 more answers

A seesaw is 4.0m long with a pivot at its midpoint. A boy who weighs 400N sits at a distance of 1.5m from the pivot. His sister

bezimeni [28]

Answer:

the girl must sit 2 cm from the pivot at the opposite end of the seesaw.

Explanation:

Given;

length of the seesaw, L = 4.0 m

weight of the boy, W₁ = 400 N

position of the boy from the pivot, d₁ = 1.5 m

weight of her sister, W₂ = 300 N

First, make a sketch of this information given;

0---0.5m---------------------Δ--------------------------4m

↓<--------1.5m-------> <---------x--------->↓

400 N 300N

Apply the principle of moment about the pivot, to determine the value of x;

Sum of anticlockwise moment = sum of clockwise moment

400(1.5) = 300(x)

600 = 300x

x = 600/300

x = 2 cm

Thus, the girl must sit 2 cm from the pivot at the opposite end of the seesaw.

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3 years ago

How long will it take a person walking at 3.2 m/s to travel 16 m? *

BigorU [14]

Answer:

speed=distance/time

time=distance/speed

time=16/3.2

time=5 seconds

time will take 5 seconds

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