# physics problem ???

posted by .

A projectile is ejected from a 25-m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth??

(Assume gravity of mars= 0.38 gravity on earth)

HOW DO I SOLVE THIS PROBLEM? need major help here! ty

• physics problem ??? -

falling a certain distnace depends on height, and g.

time to fall= sqrt(distance/g) * constant

you can work this constant out if you wish, but it will divide out .

time to fall earth/timefallMars= sqrt(.38g/g)=sqrt .38= .62

check my thinking.
You can work this out the long way if you wish...

## Similar Questions

1. ### Physics- i need to know how to do these problems

Two projectiles are launched from the ground, and both reach the same vertical height. However, projectile B travels twice the horizontal distance as projectile A before hitting the ground. a. How large is the vertical component of …
2. ### physics HELP

A projectile is fired with an initial speed of 1000 m/s at an angle of 37 degrees above the horizontal. If air resistance is neglected, the horizontal component of the projectile's velocity after 20 s is approximately A) 600 m/s B) …
3. ### Applied Maths

the horizontal range of a projectile is 4a. It passes a tower that height a/2 when the horizontal range was a. What is the projectile velocity and projectile angle.
4. ### Physics

Can someone help me get started on this problem?
5. ### physics

A projectile was fired out of a lead ejector at an angle of 45 degrees up from horizontal. The projectile velocity was 1000.00 meters per second. How high did it go?
6. ### physics

A projectile is launched over level ground at a launch angle of 70o with an initial velocity vo. At some later time while the projectile is on its way to the peak in its trajectory, its velocity vector makes an angle of 50o with respect …
7. ### physics

a projectile is ejected from a 25 m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth?
8. ### trig

On an inclined road, which makes an angle of 25 degrees with the horizontal plane, stands a vertical tower. At a point Q, 150 ft from the base of the tower down the road, the angle of elevation to the top of the tower is 65. How high …
9. ### physics

A projectile is thrown from the top of a tower anf strikes the ground after 3sec at angle of 45° with horizontal . Find height of tower and speed with which the projectile was projected.
10. ### physics

A projectile is fired from a cliff 300 m high with an initial velocity of 400 m/s. If the firing angle is 30 degrees from the horizontal, compute the horizontal range of the projectile.

More Similar Questions