Fall '24 CP-PS Unit 2 test

Describe ALL relevant forces to explain why two identical pieces of paper, dropped from the same height, will accelerate at different rates if one is crumpled and the other is not.

• The crumpled paper experiences less air resistance than the flat paper, causing it to fall faster. F = mg

• Both papers experience the same air resistance, but the crumpled paper is heavier, causing it to fall faster. F = mg

• The flat paper experiences more gravitational force than the crumpled paper, causing it to fall slower. F = mg

• The crumpled paper experiences more air resistance than the flat paper, causing it to fall slower. F = mg

Using Newton's 2nd law (and its variables) explain why the smaller car will (or will not) get hit by the larger/heavier car above it. Ignore friction. Newton's 2nd law shows that _______ so _______.

• The smaller car will not get hit by the larger/heavier car above it because according to Newton's 2nd law, the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). Since the larger car has more mass, it requires more force to accelerate it. If the smaller car is stationary and the larger car is moving, the larger car's momentum may not be sufficient to overcome the inertia of the smaller car, especially if the smaller car is at rest.

• The smaller car will get hit by the larger/heavier car because the larger car's mass gives it a greater gravitational pull, causing it to accelerate faster towards the smaller car.

• The smaller car will not get hit because the larger car's mass creates a force field that repels smaller objects, according to Newton's 2nd law.

• The smaller car will get hit because Newton's 2nd law states that objects with larger mass always move faster, regardless of the force applied.

Using Newton's 2nd law (and its variables) explain why the smaller car will (or will not) get hit by the larger/heavier car above it. Ignore friction. Since _______ and _______ the smaller car will (or will not) get hit because _______.

• The smaller car will not get hit because it has less mass and the larger car has more mass, resulting in a smaller acceleration for the smaller car.

• The smaller car will get hit because it has more mass and the larger car has less mass, resulting in a larger acceleration for the smaller car.

• The smaller car will not get hit because both cars have the same mass, resulting in no acceleration for either car.

• The smaller car will get hit because it has less mass and the larger car has more mass, resulting in a larger acceleration for the smaller car.

Using Newton's 2nd law (and its variables) explain why the smaller car will (or will not) get hit by the larger/heavier car above it. Ignore friction. According to Newton's 2nd law, _______ which means _______ the smaller car will (or will not) be hit.

• The smaller car will not be hit by the larger/heavier car because according to Newton's 2nd law, the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). Since the larger car has more mass, it will exert a greater force, but if the smaller car is stationary and the larger car is not accelerating towards it, the smaller car will not be hit.

• The smaller car will be hit by the larger/heavier car because according to Newton's 2nd law, the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). Since the larger car has more mass, it will exert a greater force and will inevitably hit the smaller car.

• The smaller car will not be hit by the larger/heavier car because according to Newton's 2nd law, the force acting on an object is independent of its mass and only depends on acceleration.

• The smaller car will be hit by the larger/heavier car because according to Newton's 2nd law, the force acting on an object is equal to the mass of the object multiplied by its velocity (F = mv).

Using Newton's 2nd law (and its variables) explain why the smaller car will (or will not) get hit by the larger/heavier car above it. Ignore friction. The smaller car's acceleration is _______ due to _______ resulting in _______.

• The smaller car's acceleration is determined by the net force acting on it divided by its mass, according to Newton's 2nd law. If the larger car exerts a greater force on the smaller car, it will accelerate towards it, potentially resulting in a collision.

• The smaller car's acceleration is independent of any forces acting on it, so it will not be affected by the larger car.

• The smaller car's acceleration is always zero because it is smaller and lighter than the larger car.

• The smaller car's acceleration is determined by its speed alone, and not by any external forces.

An 8,000 kg helicopter's speed increases from 0 m/s to 25 m/s in 5 seconds. Calculate its acceleration and the net force acting on it.

• 0.125 m/s²; 1000 N

• 5 m/s²; 40,000 N

• 5 m/s²; 1250 N

• 0.25 m/s²; 500 N

What is the Net Force on the book pictured below?

• 38 Newtons to the Right

• 38 Newtons to the Left

• 2 Newtons to the Right

• 2 newtons to the Left

What is the net force on the airplane?

• 700 N to the left

• 700 N to the right

• 900 N to the left

• 900 N to the right

The speed of light is approximately: Mark only one oval.

EXTRAPOLATING the GREEN line... what is the distance at 4 hours?

• 40 km

• 60 km

• 80 km

• 100 km