Gravitation-II

Why can a camel run easily in the desert?

• Due to its light weight.
• Due to its strong legs.
• Wide feet that prevent them from sinking into the sand

• Due to its wide tires.

What is the SI unit of pressure?

• N/cm²
• N/kg
• N/m²
• N/m

In Situation , where is the force applied?

• Perpendicular to the surface area of the board.
• Parallel to the surface of the board.
• Diagonally across the board.
• Random direction on the board.

What is thrust defined as?

• Force acting vertically downwards.
• Force acting perpendicular to a surface.
• Force acting on an object horizontally.
• Force acting at an angle.

How is pressure calculated?

• Pressure = force / time.
• Pressure = thrust/ area.

• Pressure = area / force.
• Pressure = mass × acceleration.

What determines whether an object floats or sinks?

• Its color.
• Its size.
• Its mass.
• Its density.

Why does a cork float while an iron nail sinks?

• The cork is lighter than water.
• The cork has a rough surface.
• The cork has a lower density than water.
• The cork is filled with air.

Why does a truck or motorbus have wider tires?

• To increase its speed.
• To distribute the weight evenly.
• To reduce friction with the road.
• To decrease its fuel consumption.

What is the force that enables a ship to float?

• Gravitational force.
• Buoyant force.
• Tensile force.
• Centrifugal force.

Why is it difficult to hold a school bag with a thin strap?

• Due to low friction between the strap and your hand.
• Due to high pressure on the strap.
• Due to the weight of the bag.
• Due to the thinness of the strap.