Question

Classify the following into Contact forces and Non-contact forces.
A rolling ball comes to rest, bring the unlike poles of the magnets in contact, pen slips off your hand, Lift a bucket of water, bring a straw rubbed with paper near the straw which is not rubbed with paper, carrying a load in bullock cart.​

Answer 1

Answer:

CONTACT FORCES

• Lift a bucket (muscular force)
• carrying a load in bullock cart (muscular force)

NON CONTACT FORCES

• A rolling ball comes to rest (frictional force)
• bring the unlike poles of the magnets in contact (magnetic force of attraction)
• pen slips off your hand (gravitational force)
• bring a straw rubbed with paper near the straw which is not rubbed with paper (electrostatic force of attraction)

Answer 2

Answer:

contact and non-contact forces.

Explanation:

contact forces :

• lift a bucket of water (physical force)
• carrying a load in bullock cart

Non contact-forces :

• a rolling ball comes to rest (due to friction)
• bring unlike poles of the magnet in contact (due to magnetic force)
• pen slips off your hand (due to gravitational pull)
• bring a straw rubbed with paper near the straw (due to electrostatic force of attraction)