Honors Review of Forces

Front

What forces does a hockey puck experience when moving at a constant velocity across the ice?

Back

Gravity and Normal forces act on the puck.

Front

What does Newton's Second Law state?

Back

The Net Force on an object is directly related to the object's acceleration (ΣF = ma).

Front

How do you calculate the friction force if you know the mass, acceleration, and applied force?

Back

Friction force can be calculated using the formula: Friction = Applied Force - (mass × acceleration).

Front

What is the weight of a 9 kg mass on Earth?

Back

Weight = mass × gravity = 9 kg × 10 m/s² = 90 N.

Front

What do people feel in an elevator moving upwards at a constant speed?

Back

They feel their normal weight.

Front

Define 'Net Force'.

Back

Net Force is the vector sum of all the forces acting on an object.

Front

What is the formula for calculating weight?

Back

Weight = mass × gravitational acceleration (W = mg).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object.

Front

What is the role of normal force?

Back

Normal force acts perpendicular to the surface and supports the weight of an object resting on it.