Exploring Forces in Systems Through Example Problems

The video tutorial explores a physics problem involving two blocks connected by a spring on a frictionless surface. It explains how to apply Hook's Law and Newton's Second Law to determine the acceleration of the system and the compression of the spring when a force is applied. The tutorial breaks down the problem into manageable steps, analyzing the forces on the system and individual blocks, and concludes with calculating the spring's compression.

What is the mass of each block in the problem?

• 5 kg

• 20 kg

• 10 kg

• 15 kg

Tags

NGSS.HS-PS2-1

What is the spring constant given in the problem?

• 200 N/m

• 250 N/m

• 150 N/m

• 300 N/m

What is the horizontal force applied to one of the blocks?

• 25 N

• 10 N

• 15 N

• 20 N

Tags

NGSS.HS-PS2-1

According to Hooke's Law, what does the spring force depend on?

• The mass of the blocks

• The spring constant and the change in length

• The friction between the blocks

• The horizontal force applied

What is the formula for the spring force as per Hooke's Law?

• F = ma

• F = k * ΔL

• F = m * g

• F = k / ΔL

What is the net force acting on the system?

• The force of the hand on block A

• The force of the spring

• The normal force

• The weight of the blocks

Tags

NGSS.HS-PS2-1

How do you calculate the acceleration of the system?

• By dividing the spring constant by the force of the hand

• By multiplying the force of the hand by the spring constant

• By adding the masses of the blocks

• By dividing the force of the hand by the sum of the masses

Tags

NGSS.HS-PS2-1

What forces act on block A?

• Both the force of the hand and the spring force

• Neither the force of the hand nor the spring force

• Only the force of the hand

• Only the spring force

What is the final formula used to calculate the spring compression (ΔL)?

• ΔL = (k - FHA) / ma

• ΔL = (ma - FHA) / k

• ΔL = (FHA - ma) / k

• ΔL = (FHA + ma) / k

Tags

NGSS.HS-PS2-1

What is the final value of the spring compression (ΔL)?

• 0.015 m

• 0.025 m

• 0.030 m

• 0.035 m

Tags

NGSS.HS-PS3-3