# physics-forces

posted by .

1. a fully loaded rocket has a mass of 2.92x10^6kg. It's engines has a thrust of 3.34x10^7N

a)what is the downward force of gravity of the rocket at blast off?

b)what is the unbalanced force on the rocket at blast off?

c)what is the accleration of the rocket as it leaves the launching pad?

d) as the rocket travels upwards, the engine thrust remains constant but the mass of the rocket decreases. Why? (is it because the fuel is being burnt?)

e)does the acceleration of the rocket increase, decrease or remain the same as the engines continue to fire?

2. a)using Newtons laws, explain how snow tires are different from all-season radials
b)propose another use for snow tire technology

• physics-forces -

a)
m g = 2.92*10^6 * 9.81

b)
F = Thrust - m g

c)
F= m a
so
a = (Thrust-m g)/ m

d)
The rocket is losing mass of both fuel and the oxidizer for the fuel (O2 in tanks sometimes)

e)
a = Thrust/m - mg/m = Thrust/m - g
so
if thrust is constant and m decreases, a increases

2) increase friction force, particularly if studded snow tires.

winter hiking boots?

## Similar Questions

1. ### physics

if a rocket engine delivers a constant thrust, does it deliver more power as the rocket speeds up force = mass*(acceleration) if the rocket accelerates, the force will increase wow,uh constant thrust means it is delivering constant …
2. ### physics

i need help figuring out what formaula to use for finding the final velocity of a rocket. Model rocket engines are sized by thrust, thrust duration, and total impulse, among other characteristics. A size C5 model rocket engine has …
3. ### physics

During a lift off , the thrust a rocket produces must overcome the force of gravity in order to lift the rocket off the ground. If a rocket with a mass of 5kg produces a force of 180N, how fast will the rocket be travelling 3 seconds …
4. ### physics

The engines of a 1.20 x 10^5 N rocket exert an upward thrust of 2.00 x 10^5 N for 1.50 minutes upon lift off. What is the impulse exerted on the rocket?
5. ### physics

A fully loaded Saturn V rocket has a mass of 2.92*10^6. Its engines have a thrust of 3.34*10^7 N What is the unbalanced force of gravity on the rocket at blast off What is the unbalanced force on the rocket at blast off
6. ### physics

a fully loaded saturn V rocket has a mass of 2.9*10 to the power of 6 Kg. Its engine provides a thrust of 3.3*10 to the power of 7N(down). Determine its weight (force due to gravity) as it stands on a launching platform
7. ### Physics

A 19 N thrust is exerted on a 0.4 kg rocket for a time interval of 8 s as it moves straight up. (Neglect all forces except this thrust and the force of gravity.) The rocket then continues to move upward as its speed reduces steadily …
8. ### Physics

A 19 N thrust is exerted on a 0.4 kg rocket for a time interval of 8 s as it moves straight up. (Neglect all forces except this thrust and the force of gravity.) The rocket then continues to move upward as its speed reduces steadily …
9. ### Physics-forces

1. NASA launched a 550kg satellite into space. Its engines have a thrust of 8000N. a) What is the downward froce of gravity acting on the rocket at blast off?
10. ### Physics

A model rocket has a mass of 0.435 kg. It is mounted vertically and launches directly up with a thrust force of 13.1 N. a) What is the weight of the rocket?

More Similar Questions

Post a New Question