Answer:
(wait tell someone els answers please)
Im pretty sure its A
Answer:
F=ma is the relationship where, F is force, m is mass and a is acceleration.
Newton's second law states that the unbalanced force applied to the object accelerates the object which is directly proportional to the force and inversely to the mass.
If we apply force to a toy car then It will accelerate.
This is how Newton's second law of motion is verified.
6.
Basically, all of these questions use F = ma
m = 80 kg
a = 1.62
Weight = F = 80*1.62 = 129.6
The closest answer is B
7.
<em><u>Step One</u></em>
Find the mass here on earth
m = F/a
F = 40 kg
a = 9.2
F = 40/9.2 = 4.34
Now take everything to the moon
F = 20 kg
a = ??
m = 4.34
a = F/m = 20/4.34 = 4.6 m/s^2
8
m = 40 kg
F = 20 N
a = ??
a = F/m = 20N/40kg = 1/2 m/s^2
Comment
All of these depend on F = m*a. None but the first one talk about vertical forces where gravity would play a part. Moving horizontally means that there is no gravitational force if there is no friction. a = 9.8 has nothing to do with the problem.
Answer:
15 km/s from the starting point
Explanation:
Velocity is total distace divided by total time.
From the picture, you can see that line consecutively traveled 30 kilometers- in 2 seconds.
(9 to 11 is two seconds, unless I'm wrong.)
So, total distance = 30 km. Total time = 2 seconds.
30/2 is 15.
the velocity of line A is 15 km/s from the starting point.