Consider a toy rocket that undergoes one dimensional motion. it is launched from rest straight up from the ground and rises under constant acceleration for δt1 seconds, where it loses power. it hits the earth δt2 seconds later. you can consider δt1 = t1 – t0 and δt2 = t2 – t1. what was the toy rocket’s acceleration before t1?

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

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What is the speed of an object at a given moment?