Which of the following graphs best represents an object moving with constant velocity?

• A position vs. time graph with a straight line sloping upwards.

• A velocity vs. time graph with a horizontal line.

• An acceleration vs. time graph with a horizontal line at zero.

• A position vs. time graph with a curve.

Calculate the displacement of an object that moves 5 meters east, then 3 meters west.

• 8 meters

• 2 meters east

• 2 meters west

• 0 meters

A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is the car's acceleration?

• 4 m/s²

• 5 m/s²

• 10 m/s²

• 20 m/s²

Tags

NGSS.HS-PS2-1

Using the Pythagorean theorem, calculate the resultant vector of two perpendicular vectors with magnitudes of 3 units and 4 units.

• 5 units

• 7 units

• 1 unit

• 12 units

Describe the motion of an object in equilibrium.

• The object is accelerating.

• The object is moving at a constant velocity.

• The object is at rest or moving with constant velocity.

• The object is moving in a circular path.

Tags

NGSS.HS-PS2-1

A satellite orbits Earth in a circular path. Which force is responsible for keeping it in orbit?

• Tension

• Friction

• Gravitational force

• Normal force

Tags

NGSS.HS-PS2-4

Explain how Newton's third law of motion applies when a rocket launches.

• The rocket pushes against the ground, and the ground pushes back with equal force.

• The rocket's engines push exhaust gases downward, and the gases push the rocket upward.

• The rocket's weight is balanced by the thrust of the engines.

• The rocket's acceleration is proportional to the net force applied.

Tags

NGSS.HS-PS2-1

Tags

NGSS.HS-PS2-4

A 10 kg object is subjected to a net force of 50 N. What is its acceleration?

• 0.5 m/s²

• 5 m/s²

• 10 m/s²

• 50 m/s²

Tags

NGSS.HS-PS2-1

A car travels 100 meters in 5 seconds. Calculate the power if the work done is 2000 Joules.

• 400 Watts

• 200 Watts

• 100 Watts

• 40 Watts

Tags

NGSS.HS-PS3-1