Question

question 3
1 pts
the following questions refer to the following situation. in a circus parade, a clown standing on a float moving at a constant forward speed drops a fake dumbbell. a child in the bleachers on the sidewalk observes the dumbbell. ignore air resistance.
who would observe the dumbbell falling backward?
both the clown and the child
neither the clown nor the child
the child only
the clown only

question 4
1 pts
the following questions refer to the following situation. in a circus parade, a clown standing on a float moving at a constant forward speed drops a fake dumbbell. a child in the bleachers on the sidewalk observes the dumbbell. ignore air resistance.
who would observe the dumbbell falling straight down?
both the clown and the child
neither the clown nor the child
the child only
the clown only

Explanation:

Step1: Analyze motion from clown's perspective

The clown is on the moving float. The dumb - bell has the same horizontal velocity as the float. In the clown's frame of reference (which is moving with the float), there is no horizontal acceleration or force acting on the dumb - bell (ignoring air resistance). So, the dumb - bell appears to fall straight down.

Step2: Analyze motion from child's perspective

The child is stationary on the sidewalk. The dumb - bell has an initial horizontal velocity equal to the velocity of the float. As it falls, it follows a parabolic path due to the combination of its horizontal motion (with constant velocity) and vertical motion (with constant acceleration due to gravity). So, the child sees a parabolic path, not the dumb - bell falling straight down or backward.

Answer:

Question 3: B. neither the clown nor the child
Question 4: D. the clown only