Consider the following graphs (note the axes carefully). Which of these represent motion at constant speed?
Correct answer: D. I only
- A. IV only
- B. I, II, and III only
- C. III only
- D. I only
Explanation
Speed = slope of distance-time graph The slope of graph (I) is constant. So, speed is constant. to solve these questions it is necessary to look at the variables on the x and y- axis
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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