Newton's 2nd Law

A constant unbalanced force is applied to an object for a period of time. Which graph best represents the acceleration of the object as a function of elapsed time?

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Tags

NGSS.HS-PS2-1

The diagram shows a horizontal 12-newton force being applied to two blocks, A and B, initially at rest on a horizontal, frictionless surface. Block A has a mass of 1 kilogram and block B has a mass of 2 kilograms. The magnitude of the acceleration of block B is

• 6.0 m/s²

• 2.0 m/s²

• 3.0 m/s²

• 4.0 m/s²

Tags

NGSS.HS-PS2-1

Which body is in equilibrium?

• a satellite moving around Earth in a circular orbit

• a cart rolling down a frictionless incline

• an apple falling freely toward the surface of Earth

• a block sliding at constant velocity across a tabletop

The diagram represents two concurrent forces. Which vector below represents the force that will produce equilibrium with these two forces?

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In the diagram below, a 20-newton force due north and a 20-newton force due east act concurrently on an object, as shown in the diagram below. The additional force necessary to bring the object into a state of equilibrium is

• 20 N, northeast

• 20 N, southwest

• 28 N, northeast

• 28 N, southwest

A man standing on a scale in an elevator notices that the scale reads 30 newtons greater than his normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?

• accelerating upward

• accelerating downward

• moving upward at constant speed

• moving downward at constant speed

Tags

NGSS.HS-PS2-1

Two forces, F₁ and F₂, are applied to a block on a frictionless, horizontal surface as shown below. If the magnitude of the block’s acceleration is 2 m/s², what is the mass of the block?

• 1 kg

• 5 kg

• 6 kg

• 7 kg

Which diagram represents a box with balanced forces?

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Tags

NGSS.HS-PS2-1

The diagram shows a 5-kilogram block at rest on a horizontal, frictionless table. Which diagram best represents the force exerted on the block by the table?

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Tags

NGSS.HS-PS2-1

A 1.5-kilogram lab cart is accelerated uniformly from rest to a speed of 2.0 meters per second in 0.50 second. What is the magnitude of the force producing this acceleration?

• 0.70 N

• 1.5 N

• 3.0 N

• 6.0 N

Tags

NGSS.HS-PS2-1