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SOVA2 [1]
3 years ago
6

QUESTION 1

Physics
1 answer:
Molodets [167]3 years ago
3 0
Question 1: C Question 2: B, Hope this Helps!
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4. A latch holding a cart in place, hanging high above the ground, breaks and the cart falls. The cart started from rest and is
scoray [572]

Answer:

a) 31.4 m/s

b) 50.2 m

Explanation:

a) When an object is free falling, its speed is determined by the gravity force giving it acceleration. Equation for the velocity of free fall started from the rest is:

v = g • t

g - is gravitational acceleration which is 9.81 m/s^2, sometimes rounded to 10

t - is the time of free fall

So:

v = 9.81 m/s^2 • 3.2

v = 31.4 m/s ( if g is rounded to 10, then the velocity is 10 • 3.2 = 32 m/s)

b) To determine the distance crossed in free fall we use the equation:

s = v0 + gt^2/2

v0 - is the starting velocity (since object started fall from rest, its v0 is 0)

s = gt^2/2

s = 9.81 m/s^2 • 3.2^2 / 2

s = 50.2 m (if we round g to 10 then the distance is 10 • 3.2^2/2 = 51.2 meters)

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Answer:

B. They are smaller and made of rocky material

Explanation:

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A solid ball has a radius of 2cm and a length of 7cm. It has a density of 3.1g/cm3
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Which describes freefall
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A motion where gravity is the only force acting upon it
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