A net force of 25.0 N causes an object to accelerate at 4.00 m/s2. What is the mass of the object?
2 answers:
Answer:
Mass, m = 6.25 kg
Explanation:
It is given that,
Net force acting on the object, F = 25 N
Acceleration of the object,
Let m is the mass of the object. Using Newton's second law of motion. The force is given by :
F = ma
m = 6.25 kg
So, the mass of the object is 6.25 kg. Hence, this is the required solution.
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Answer:
a) The answer is 11,7m
b) The time it takes to fall will be shorter
Explanation:
We will use the next semi-parabolic movement equations
Where g(gravity acceleration)=9,81m/s^2
Also Xi, Hi and Viy are zero, as the stones Billy-Jones is kicking stay still before he moves them, so we take that point as the reference point
The first we must do is to find how much time the stones take to fall, this way:
Then t=1,54s
After that we need to replace t to find H, this way
Then H=11,7m
b) The stones will fall faster as the stones will be kicked harder, it will cause the stones move faster, it means, more horizontal velocity. In order to see it better we could assume the actual velocity is two times more than it is, so it will give us half of the time, this way:
Then, t=0,77