The answer is False, they are not always correct
Answer:
0 kgm/s
Explanation:
The momentum is the product of mass(m) and velocity(v).
Initially the velocity of truck is 0 m/s so the product of mass and velocity becomes 0.
It does not matter what is the weight of truck, because the velocity will make the product of m*v = 0
It does not matter what is the momentum of car.
Yes, a laboratory balance can accurately measure mass on moon also.
Explanation
The work of laboratory balance is to determine the mass of an object.
Generally, a laboratory balance consists of two pans and it determines the mass of an unknown object by reference with a known mass object.
Also the mass of any object tends to remain constant in all conditions.
The mass has no effect due to gravitational force unlike weight. So the laboratory balance can work accurately in any environment as the mass will be constant in any case.
Thus, if a laboratory balance measures mass accurately on earth, then it will measure mass accurately on moon also as mass is not dependent on gravitational force.
I believe it’s A, i could be wrong tho 3
Answer:
<h3>The answer is 7 kg</h3>
Explanation:
To find the mass of the object given the force and acceleration we use the formula
where
f is the force
a is the acceleration
m is the mass
From the question
f = 49 N
a = 7 m/s²
We have
We have the final answer as
<h3>7 kg</h3>
Hope this helps you