SAD Y10 Term 1

What are balanced forces?

• forces of the same size, in opposite directions
• the same size in the same direction
• forces in opposite directions
• forces at right angles to each other

What do we call the forwards force produced by an aeroplane's engine or propeller?

• thrust
• friction
• weight
• gravity

What is happening?

• Car is at rest

• Car is moving a constant speed

• Car is accelerating

• Car is decelerating

What is the speed of segment A?

• 0.5 m/s

• 2 m/s

• 3 m/s

• 0 m/s

Tags

NGSS.MS-PS3-1

What is the speed of segment B?

• 0.5 m/s

• 2 m/s

• 3 m/s

• 0 m/s

Tags

NGSS.MS-PS3-1

What is the speed of segment C?

• 0.5 m/s

• 2 m/s

• 3 m/s

• 0 m/s

What is the total distance traveled?

• 20 m

• 30 m

• 40 m

• 50 m

Answer explanation

Read carefuuly the Graph

the person move all the wy to 20 m and then came back

so

20+20 = 40 !!!

Part A of the graph is from 0s to 25s. Which of these statements is true about Part A?

• The object is at rest.

• The object is accelerating (its velocity is increasing)

• The object is decelerating (its velocity is decreasing)

• The object is moving at a constant velocity.

Tags

NGSS.HS-PS2-1

Part D of the graph is from 55s to 95s. During Part D, the velocity values are all negative. What does negative velocity mean?

• The object is slowing down.

• The object is moving in the opposite direction now.

During section A of the graph (between 0s and 25s), the object is accelerating.

What is its acceleration? (type ONLY a number 2 DP - no UNITS)