Buzz Lightyear, while flying in his ship, sees a meteorite of mass m = 1 kg head

Question

Buzz Lightyear, while flying in his ship, sees a meteorite of mass m = 1 kg heading in the positive y-direction at speed vo = 1,000 m/s, directly toward Andy's house. To deflect it, 5) he shines his laser in the positive x-direction, at the meteorite. If Buzz's laser exerts 100 N of force with photon pressure, and he shines it for 10 What is the final velocity (speed and direction) of the meteorite? velocity (speed and direction)? a. seconds, what is the impulse on the meteorite (magnitude and direction)? b. c. If Buzz's ship has a mass M- 2,000 kg and was initially at rest, what is its final

Explanation / Answer

(A) impulse = F t

= 100 x 10

= 1000 kg m/s

(B) Impulse = change in momenum = m (vf - vi)

1000 = 1 ( vx - 0 )

vx = 1000 m/s

and it have vy= 1000 m/s (Given)

Speed = sqrt(vx^2 + vy^2) = 1414 m/s

direction = tan^-1(vy/vx) = 45 deg

(C) from newton' 3rd law, ship will experience 100 N in -ve x axis direction.

- 1000 = 2000 (vx - 0)

vx = - 0.5 m/s

Speed = 0.5 m/s  

in the negative x direction.

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