Grade 8 Laws of Motion, Force and Energy Flashcards

Front

A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s², which force is closest to the net force acting on the vehicle?

Back

-1,300 N

Front

What conclusion can be made about the difference between the calculated acceleration and the actual acceleration in the three trials?

Back

Another force in the direction of the motion produced a higher acceleration than calculated.

Front

An archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s² to reach a speed of 50.0 m/s as it left the bow. During this acceleration, what was the net force on the arrow to the nearest newton?

Back

300 N

Front

Why did the leaf fall in a crooked path instead of straight down?

Back

Air currents and gravity applied changing and unbalanced forces to the leaf.

Front

Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student's push is 4 N, what is the net force acting on the board?

Back

6 N

Front

What formula can be used to find the acceleration of Deep Space 1 (mass: 500 kg, net force: 0.10 N)?

Back

0.10 N / 500 kg

Front

A golfer hits a golf ball with a club. The mass of the ball is 0.05 kg. The ball accelerates at 2,00 m/s². What is the net force, to the nearest newton, that accelerates the ball?

Back

100 N

Front

A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. If the resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s²?

Back

18 m/s²

Front

During which part(s) of the marble's fall did the marble experience unbalanced forces?

Back

Parts 1 and 2 only

Front

An astronaut with a mass of 60.00 kg experienced an acceleration of 29.0 m/s² during a space shuttle launch. What net force in newtons did the astronaut experience?

Back

1740 N