Explanation

• A parachute increases air resistance (drag) when it opens in the air.
• This slows down the falling speed of a skydiver, allowing a safe landing.

Forces acting on a skydiver:

• Gravity (pulls downward)
• Air resistance (pushes upward)

Last verified on 07-03-2026

Explanation

• An iron nail/steel rod can be magnetized by passing an electric current around it, a process known as electromagnetic induction.
• This is the principle behind electromagnets.

Last verified on 07-03-2026

Explanation

• Friction is a force that opposes motion between two surfaces in contact.
• It slows down or stops objects when they move against each other.
• Friction helps us walk, write, and hold objects without slipping.
• Too much friction can cause heat and wear in machines.

Last verified on 07-03-2026

Explanation

• An eraser is usually made of rubber, which does not attract magnets.
  • Magnetic materials are substances that are attracted by a magnet.
  • Materials like iron and steel are magnetic, while rubber or plastic items are non-magnetic.

Additional information:

• Common Magnetic Materials:
  • Iron
  • Nickel
  • Cobalt
  • Steel (paper clip, iron nail)
  • Some alloys
  Non-magnetic examples: Rubber, wood, plastic, paper.

Last verified on 07-03-2026

Explanation

• Protons and neutrons form the nucleus of an atom.
• Together, they are called nucleons because they are nuclear particles.

Additional information:

• Nucleons determine the mass of an atom.
• Isotopes are atoms of the same element with different number of neutrons.

Last verified on 07-03-2026

Explanation

• In solids, particles are tightly packed and cannot move freely.
• Their motion is limited to vibrations around fixed positions.
• Solids retain definite shape and volume due to limited particle motion.

Last verified on 07-03-2026

Explanation

• Khairpur District in Sindh is the largest producer of dates in Pakistan.

Additional information:

• Date Varieties: Aseel, Dhakki, Mehran, Begum Jangi
• Annual Production: Around 150,000–200,000 tons (approx.)

Last verified on 07-03-2026

Explanation

Explanation

• The M-2 Motorway connects Lahore and Islamabad.

Additional information:

• Length: 375 km
• Constructed: 1992
• North End: Kashmir Highway Interchange, Islamabad
• South End: Thokar Niaz Baig, Lahore

Last verified on 07-03-2026

Explanation

• • Pakistan won an Olympic gold medal most recently at the 2024 Paris Olympics
  • Most Recent Gold: 2024 (Arshad Nadeem, Javelin Throw)
  • Last Hockey Gold: 1984 (Los Angeles)
  • Previous Hockey Golds: 1968 (Mexico City), 1960 (Rome) 
  • Total Official Medals: 10
  • Gold Medals: 3 (all in Men’s Field Hockey)
  • Pakistan won gold in hockey in 1960, 1968, and 1984.

Last verified on 07-03-2026