MAP Science 2 — Questions and Answers
Question 1: A student pushes a 2 kg cart and a 4 kg cart with the same force. Which statement best describes the result?
- Both carts accelerate equally
- The 2 kg cart accelerates twice as much as the 4 kg cart (Correct answer)
- The 4 kg cart accelerates twice as much as the 2 kg cart
- Neither cart accelerates because the forces are balanced
Correct answer: The 2 kg cart accelerates twice as much as the 4 kg cart
By Newton's second law (a = F/m), halving the mass doubles the acceleration for the same force.
Question 2: Which energy transformation occurs when a battery-powered flashlight is turned on?
- Light energy to chemical energy
- Thermal energy to electrical energy
- Chemical energy to electrical energy to light energy (Correct answer)
- Mechanical energy to chemical energy
Correct answer: Chemical energy to electrical energy to light energy
The battery stores chemical energy, which becomes electrical energy and then light (and some heat) in the bulb.
Question 3: A ball is thrown straight up. At its highest point, what is true about its energy?
- Kinetic energy is at its maximum
- Potential energy is at its maximum (Correct answer)
- Total mechanical energy is zero
- Potential energy is zero
Correct answer: Potential energy is at its maximum
At the top the ball momentarily stops, so kinetic energy is lowest and gravitational potential energy is highest.
Question 4: Sound travels fastest through which medium?
- Air
- Vacuum
- Water
- Steel (Correct answer)
Correct answer: Steel
Sound moves fastest through solids like steel because particles are tightly packed and transmit vibrations quickly.
Question 5: Two magnets are placed with their north poles facing each other. What will happen?
- They will repel (Correct answer)
- They will attract
- They will lose their magnetism
- Nothing will happen
Correct answer: They will repel
Like magnetic poles repel each other.
Question 6: Which change would increase the strength of an electromagnet?
- Using a plastic core instead of iron
- Decreasing the current
- Adding more coils of wire (Correct answer)
- Using fewer coils of wire
Correct answer: Adding more coils of wire
More wire coils concentrate the magnetic field and make the electromagnet stronger.
Question 7: A wave's frequency increases while its speed stays the same. What happens to its wavelength?
- It increases
- It stays the same
- It doubles regardless of frequency
- It decreases (Correct answer)
Correct answer: It decreases
Since speed = frequency × wavelength, a higher frequency at constant speed means a shorter wavelength.
MAP Science 2
A student pushes a 2 kg cart and a 4 kg cart with the same force.
Which statement best describes the result?