A box weighs 49 N on Earth. On the Moon (g = 1.6 m/s²), its weight is:

A liquid has mass 45 g and volume 30 cm³. Its density is:

If 500 cm³ of oil has mass 400 g, its density in kg/m³ is:

A cyclist rides 400 m uphill in 80 s and 400 m downhill in 40 s. Average speed is:

A runner completes 200 m in 25 s, then 200 m back in 15 s. Average speed is:

A speed-time graph shows increasing speed then horizontal line. This means:

A speed-time graph slopes downward then levels out. This shows:

James has a uniform square-shaped piece of cardboard with its center of gravity marked at the centre. If James cuts away the right half of the cardboard, in which direction does the center of gravity move?

From a circular disk, a small circle is cut from top right. Center of mass moves:

Two identical beakers: one water, one oil (less dense). Pressure at same depth is:

When a rocket is launched, what are the primary forms of energy wasted during the process?

A loudspeaker converts electrical to sound. Wasted energy is mainly:

To calculate power of lifting machine, need:

David is running upstairs in his house. The power he uses depends on:

Which stores gravitational potential energy?

Which directly uses Sun's radiation?

Which of the following is a non-renewable resource?

Which of the following is a renewable resource?

Why does the pressure inside a tire rise when it gets warmer?

At constant volume, gas pressure decreases when:

Water droplets form on the outside of a cold glass of lemonade. This process is an example of:

Under microscope Grace observes that tiny pollen grains jiggle when she places them in a glass of water. This movement is due to:

In a quiet room, smoke particles move randomly, deviating from a short, straight path because:

The lower fixed point on the Celsius scale is:

You want to find the upper fixed point of a thermometer, which is the temperature of:

For an equal increase in temperature, which state of matter shows the greatest increase in volume?

Aria notices that there are small gaps between sections of railway tracks during a train ride. Why are these gaps left?

Why is the bulb of a clinical thermometer made small?

Why should you choose a thermometer with a liquid that has low heat capacity?

Evaporation mainly takes place at which part of a liquid?

Evaporation causes cooling because:

Why does a bimetallic strip curve when heated?

A solid substance melts at constant temperature because:

The flat parts of a heating curve show:

During the melting and boiling of pure water, the average kinetic energy of its particles:

As liquid gold is heated from its melting point to its boiling point, the potential energy of its particles:

Jackson starts from rest and drives his car, accelerates at 3 m/s² for 5 s, then continues for 10 s at constant speed. What is the total distance Jackson covers?

4 kg object changes from +5 m/s to –3 m/s. Calculate the change in momentum Δp =

A ball (0.2 kg) hits a wall at 10 m/s for 0.5 seconds, and rebounds at 8 m/s. Calculate impulse and force applied.

Choose the correct answer: When an object is dropped in a vacuum:

When a free-falling object reaches terminal velocity, which of the following is true?

A rock weighs 98 N on Earth and 16.3 N on Planet Xion. What is the value of g on Planet Xion?

Henry is on Mars where g = 3.7 m/s². If he picks up a 10 kg mass, how much does it weigh?

53. William pushes a 2 kg box so that its speed increases from 4 m/s to 10 m/s. If William applies a force of 12 N, how much time does he push the box?

Liam pushes a 5 kg box with a force of 10 N, causing its velocity to change from rest to 10 m/s. What is the time taken?

You are holding a uniform beam (length = 100 cm, weight = 40 N) that is pivoted at 30 cm. He places a 20 N load at the right end. What force F must Rohan apply at the left end to balance the beam?

See-saw: child (200 N) 2 m from pivot. Parent (400 N) sits 1 m from pivot on other side. Beam weight 100 N (center at pivot). System is:

A spring extends 4 cm when a force of 12 N is applied. What is the value of k (spring constant)?

Abigail is setting up a science experiment with a spring. The spring has a natural length of 10 cm, but when she hangs an 8 N weight from it, the spring stretches to a length of 14.5 cm. What is the value of k in SI unit (N/m)?

For a motor that is 80% efficient, if the useful output is 400 J, what is the total input?

Aria uses a heater that consumes a total of 2000 J of energy and wastes 600 J. What is its efficiency?

An object experiences a net force of 4 N and is moved from rest to a height of 5 m. What is its gain in kinetic energy? (Assume gravitational potential energy can be completely converted to kinetic energy.)

A 0.5 kg ball is moving at 12 m/s. What is its kinetic energy (KE)?

A car (800 kg) is moving at 15 m/s. What is its kinetic energy (KE)?

A crane lifts a mass m through a height h in time t, with power P. To lift a mass of 2m through h/2 in t/2, what is the power?

Machine A does work W in time T. Machine B does 3W in 2T. What is the power ratio B:A?

An object is dropped from a height of 20 m (g = 10 m/s²). What is its speed when it reaches the ground? (Hint: mgh = 0.5mv²)

A stone falls 45 m. What is its speed after falling 45 m?

Anika fills a 2 L balloon with an ideal gas at 100 kPa. She then compresses the balloon to a volume of 0.5 L at constant temperature. What is the new pressure?

A piston compresses a gas to 1/3 of its original volume. What happens to the pressure?

Noah is scuba diving and notices a gas bubble at a depth where the pressure is $$2\times10^{5}\ \text{Pa}$$ and the bubble's volume is 5 cm³. As the bubble rises to the surface, where the pressure is 1 atm, what is the new volume of the bubble?

Diver at 30 m depth (P= $$4\times10^5 Pa$$ ) releases 8 cm³ bubble. At 10 m depth (P = $$2\times10^5 Pa$$ ), volume =

Which of the following features increases the sensitivity of a thermometer?

Liquid-in-glass thermometer sensitivity increased by:

Henry is conducting an experiment in his lab and cools a sample down to absolute zero. What happens at this temperature?

What is the value of absolute zero on the Kelvin scale?

3 kg metal requires 630 J to increase its temperature by 5°C. What is the specific heat capacity (c)?

0.5 kg of water (c = 4200 J/(kg°C)) is heated by 20°C. What is the energy required?

Water boils at 100°C, yet temperature remains constant because:

A 5 kg mass weighs 49 N on Earth. On the Moon (g = 1.6 m/s²), what is its weight?

A liquid has mass 45 g and volume 30 cm³. Its density is:

If 500 cm³ of oil has mass 400 g, its density in kg/m³ is:

A cyclist rides 400 m uphill in 80 s and 400 m downhill in 40 s. Average speed is:

A runner completes 200 m in 25 s, then 200 m back in 15 s. Average speed is:

A speed-time graph shows increasing speed then horizontal line. This means:

A spacecraft coasts (moves) with its engines off. If no forces act, it:

A uniform square has center at middle. If right half is removed, center moves:

From a circular disk, a small circle is cut from top right. Center of mass moves:

Two identical beakers: one with water, one with oil (less dense). Pressure at the same depth is:

In an electric motor, the main wasted energy is:

A loudspeaker converts electrical to sound. Wasted energy is mainly:

The Power" of a man running upstairs depends on:

Which stores gravitational potential energy?

I began to walk, then increased my pace and kept it constant for a period of time, and then slowly decreased my pace. Which graph models this situation?

What is this graph showing?

What is this graph showing?

What is the graph showing?

What is the graph showing?