A toy rocket engine is securely fastened to a large puck that can glide with neg

Question

A toy rocket engine is securely fastened to a large puck that can glide with negligible friction over a horizontal surface, taken as the xy plane. The 8.00-kg puck has a velocity of 2.00 m/s at on instant. Eight seconds later, its velocity is (6 +19 )m/s. Assuming the rocket engine exerts a constant horizontal force, find the components of the force. We know the change in velocity during an 8 second time interval. How do you calculate the acceleration? N Find its magnitude. N Besides the gravitational force, a 2.75-kg object is subjected to one other constant force, The object starts from rest and in 1.20 s experiences a displacement of (4.33 -3.30 )m, where the direction of is the upward vertical direction. Determine the other force. N

Explanation / Answer

you asked two questions here is the answer for the first. acceleration in the x direction = dVx/dt = (6-2)/8 = 4/8 =0.5 Fx = max = 8*0.5 = 4 you got y but here is a check ay = 19/8 Fy = m ay = 8*19/8 =19 b) magnitude = sqrt(Fx^2 + Fy^2) = sqrt(4^2 + 19^2) =19.42 N

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