How much force does a 80 kg astronaut traveling at 2m/s have to use to throw his 5kg tool box to send the astronaut the opposite way at 1m/s


weight of the box is given as

w = 112.1 n

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

w_x = w sin\theta

here we have

w = 112.1 n

w_x = 112.1 sin42

w_x = 75 n

so it requires 75 n force to move it upwards

this is poiselle's equation from fluid mechanic in physics. mech eng

no 1 you are spot on ball at rest in grass

2 if car stops people keep going newton 1 until the window tries to stop them seatbelts

3 yup to go forward he pushes boat back and may get wet

4 yup f=ma bigger f biggger a further it goes good game golf

5 bike and boy are moving but what about air resistance ?

6 if it's that the heavy mass doesn't go as far as the lighter masss f=ma f same m,a different then yes

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