Motion and Forces Test STUDY GUIDE

What is speed? What is the formula and what are some units for speed?

• Speed is a measure of how fast something moves. The formula is speed = distance/time, and units include meters per second (m/s) and kilometers per hour (km/h).

• Speed is a measure of how slow something moves. The formula is speed = time/distance, and units include seconds per meter (s/m) and hours per kilometer (h/km).

• Speed is a measure of how fast something moves. The formula is speed = time/distance, and units include seconds per meter (s/m) and hours per kilometer (h/km).

• Speed is a measure of how slow something moves. The formula is speed = distance/time, and units include meters per second (m/s) and kilometers per hour (km/h).

What is average speed? What is instantaneous speed?

• Average speed is the total distance traveled divided by the total time taken. Instantaneous speed is the speed of an object at a particular moment in time.

• Average speed is the speed of an object at a particular moment in time. Instantaneous speed is the total distance traveled divided by the total time taken.

• Average speed and instantaneous speed are the same and can be used interchangeably.

• Average speed is the speed of an object at rest, while instantaneous speed is the speed of an object in motion.

How is velocity different from speed?

• Velocity is a scalar quantity, while speed is a vector quantity.

• Velocity is a vector quantity, while speed is a scalar quantity.

• Velocity and speed are both vector quantities.

• Velocity and speed are both scalar quantities.

What is acceleration? In what three ways can something accelerate? What is the formula for acceleration and what is a unit for acceleration?

• Acceleration is the rate of change of velocity. It can occur by speeding up, slowing down, or changing direction. The formula is a = Δv/Δt and the unit is m/s².

• Acceleration is the rate of change of speed. It can occur by speeding up, slowing down, or changing direction. The formula is a = Δs/Δt and the unit is m/s.

• Acceleration is the rate of change of velocity. It can occur by speeding up, slowing down, or changing direction. The formula is a = Δv/Δt and the unit is km/h².

• Acceleration is the rate of change of velocity. It can occur by speeding up, slowing down, or changing direction. The formula is a = Δv/Δt and the unit is m/s.

What is the difference between deceleration and zero acceleration?

• Deceleration is a decrease in speed, while zero acceleration means constant speed.

• Deceleration means constant speed, while zero acceleration is a decrease in speed.

• Deceleration and zero acceleration both mean an increase in speed.

• Deceleration and zero acceleration both mean a decrease in speed.

Why do you need to have a reference point when you’re discussing motion?

• To measure the distance traveled

• To determine the speed of an object

• To describe the position of an object

• To calculate the time taken

What is the acceleration due to gravity on Earth?

• 9.8 m/s²

• 5 m/s²

• 15 m/s²

• 20 m/s²

Which of the following graphs represents an object that is going away from the starting point, going back towards the starting point, and not moving?

• Graph A: A straight line moving upwards, a straight line moving downwards, and a horizontal line.

• Graph B: A horizontal line, a straight line moving upwards, and a straight line moving downwards.

• Graph C: A straight line moving downwards, a horizontal line, and a straight line moving upwards.

On the three speed-time graphs, which graph represents an object that is speeding up, slowing down, and not moving?

• Graph A: Speeding up, Graph B: Slowing down, Graph C: Not moving

• Graph A: Not moving, Graph B: Speeding up, Graph C: Slowing down

• Graph A: Slowing down, Graph B: Not moving, Graph C: Speeding up

• Graph A: Speeding up, Graph B: Not moving, Graph C: Slowing down

What is a force? What is the unit for force?

• A force is an interaction that causes an object to change its velocity, direction, or shape. The unit for force is the Newton (N).

• A force is a type of energy that can be stored in an object. The unit for force is the Joule (J).

• A force is a measure of the amount of matter in an object. The unit for force is the Kilogram (kg).

• A force is a type of wave that travels through space. The unit for force is the Hertz (Hz).