Moving Things People and Ideas - 1 - Free MCQ Practice Test with solutions,

A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure.

S.I. unit of force is Newton.
One Newton is a force required to push a body of mass of one kg to a distance of one meter.

Fluid friction can be minimized by giving suitable shapes to the objects moving in the fluids.

The least count of a measuring instrument is the smallest change in the quantity being measured that can be detected. In this case, the scale has 20 divisions in 1 centimeter. To find the least count, we divide the smallest division (1 cm) by the number of divisions.

So, the least count is 0.05 cm or 0.5 mm. Therefore, the correct answer is (d) 0.5 mm.

In machine, friction between moving parts is reduced by using lubricants. These lubricants stick with machine parts to make them smoother that leads to reduction in friction.

Hectare is a unit of area commonly used for measuring large land areas, especially in agriculture.
Therefore, the correct answer is (c) Area.

• Fluid is a general term, that both liquid and gas fit under.
• A liquid has a definite volume and is incompressible.
• All liquids are fluids, but not all fluids are liquids.
• Therefore, fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids, etc.

Hectare is a unit of area and is commonly used to measure large land areas, particularly in agriculture.
Therefore, the correct answer is (c) Area of crop land.

A polished marble surface has the least frictional force, hence a car will travel farther on a marble floor.

One meter is equal to 100 cm and one cm is equal to 10 mm. therefore, a meter is equal to 100 × 10 = 1000 mm.

Sundials were used for measuring time in earlier days on the basis of shadow position.

• Friction comes into play when irregularities present in the surfaces of two objects in contact get interlocked with each other.
• In sliding, the time given for interlocking is very small. Hence, the interlocking is not strong.
• Therefore, less force is required to overcome this interlocking. Because of this reason, sliding friction is less than static friction.

If we observe the motion of the bob in the above figure, we see it moves to and fro about a point ‘O’. This type of motion is known as oscillatory motion. Also the motion of simple pendulum is a periodic motion as it takes equal time to complete one oscillation.

Measurement is the process of comparing an unknown quantity with a known or standard quantity.
Therefore, the correct answer is (a) Measurement.

• A ball rolling on ground slows down and finally stops because of friction offered by the ground.
• Frictional force works in the opposite direction of motion to slow down the ball.

Motion of simple pendulum is known as periodic motion.

Option (c)

Change in position of a body with respect to its surrounding is called as motion.

A swing moves back and forth in a regular, repeating pattern, which is characteristic of periodic motion. This type of motion repeats at regular intervals, such as the swinging of a pendulum.

• A: Rectilinear motion refers to motion along a straight line, which is not the case for a swing.
• B: Rotational motion refers to motion around a fixed axis, like a spinning wheel, not the type of motion a swing exhibits.
• D: Circular motion refers to motion along a circular path, but a swing typically moves in a back-and-forth arc, not a full circle.

Thus, a moving swing exhibits periodic motion.

The time of sunrise is a specific point in time and does not represent a time interval.
Therefore, the correct answer is (a) Time of sunrise.

Muscular force is called contact force 

• Muscular force involves using muscles to push, pull, or lift objects.
• This type of force requires physical interaction with an object, meaning direct contact is necessary.
• Examples include lifting a book, kicking a ball, or pulling a rope.
• Contact forces, like muscular force, arise from physical interactions, distinguishing them from non-contact forces such as gravity or magnetism.

Volume is typically measured in units like liters or milliliters. Liters are more appropriate for larger quantities like the volume of milk in a bucket.

Therefore, the correct answer is (c) Liters.

One hour = 60 minute and one minute = 60 seconds. Therefore, one hour= 60 x 60 = 3600 seconds.

Friction always acts in the opposite direction to the motion, hence the force of friction will be from left to right.

Friction produces heat. When two moving surface are in contact of each other, they produce friction due to which heat is developed.
Example: Moving fans become hot due to this friction.

S.I. unit of time is second.

Since 1 meter is equal to 100 centimeters, we can convert 100 millimeters to centimeters.

Therefore, the correct answer is (d) 10 cm.

Diameter of a circle is twice the radius of the circle. D = 2 × r.

Contact forces are those that result when the two interacting objects are perceived to be physically contacting each other.
Example: Frictional forces, tensional forces, normal forces, air resistance forces, and applied forces.

The speed of vehicle at particular point of time is recorded by speedometer fitted on the dashboard of vehicle.