Answer:
Approximately
.
Assumption: air resistance on the rocket is negligible. Take
.
Explanation:
By Newton's Second Law of Motion, the acceleration of the rocket is proportional to the net force on it.
.
Note that in this case, the uppercase letter
in the units stands for "mega-", which is the same as
times the unit that follows. For example,
, while
.
Convert the mass of the rocket and the thrust of its engines to SI standard units:
- The standard unit for mass is kilograms:
. - The standard for forces (including thrust) is Newtons:
.
At launch, the velocity of the rocket would be pretty low. Hence, compared to thrust and weight, the air resistance on the rocket would be pretty negligible. The two main forces that contribute to the net force of the rocket would be:
- Thrust (which is supposed to go upwards), and
- Weight (downwards due to gravity.)
The thrust on the rocket is already known to be
. Since the rocket is quite close to the ground, the gravitational acceleration on it should be approximately
. Hence, the weight on the rocket would be approximately
.
The magnitude of the net force on the rocket would be
.
Apply the formula
to find the net force on the rocket. To make sure that the output (acceleration) is in SI units (meters-per-second,) make sure that the inputs (net force and mass) are also in SI units (Newtons for net force and kilograms for mass.)
.
Answer:
I need help with one to
Explanation:
Im trying to ask someone but no one knows :(
Answer:
1: an elevator moving up to the 3rd floor (gathering potential energy)
2: all options here will increase the GPE
3: the last option
4: just before it hits the ground and has reached a speed of 28 meters per second
5: turning a different direction while moving the same speed
6:a jogger getting faster after spotting a mountain lion behind him on the trail
7: I didn’t watch the lesson
8: at the top of the swinging path, when you are still for a moment just before falling again
9: I d+o)n#t k#n0”w
10: same as 9 sor=ry
Answer:
D) the two spheres remain of equal size.
Explanation:
- Since the body of the sphere is made up of both the same material. Thus the orientation will not affect the expansion. That is solid upon solid and hollow upon the hollow sphere. Hence it can be said that both the sphere expands and is due to the material used for making both of them is the same.
I cannot understand what you are saying.