Starting from rest, a 4 kg object reaches a speed of 8.0 m/s in 2.0 s. Part A: What is the object’s acceleration?
Part B: What is the net force acting on the object?

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Smallest intensity of a stimulus that you can detect 50 percent of the time is