Mass and Weight

Q.

The weight of a body at the centre of the earth is ___.

1. infinite

2. same as other places

3. equal to the weight on surface of the earth

4. zero

Q.

What is the mass of an object whose weight is 49 N? Take g = 9.8 $m{s}^{-2}$

1. 5 kg

2. 6 kg

3. 3 kg

4. 4 kg

Q.

What is the SI unit of mass, weight and force?

Q. What is the relation between mass and weight?

Q.

Why does the weight of an object differs on poles and equator?

Q.

The gravitational force between the earth and an object is called

1. Mass

2. Weight

3. Frictional force

4. Acceleration due to gravity

Q.

Convert a force of 5 kg-wt into SI unit of force .

Q.

A man stands on a weighing machine. The weighing machine Shows 45.Is 45 the weight or the mass.(2 marks)

Q.

The force with which the earth attracts a body towards itself is called

1. Mass

2. Weight

3. Electrostatic force

4. Magnetic force

Q. Force of gravitation is inversely proportional to the ______of distance between the objects.

1. square root
2. cube
3. square
4. cube root

Q. What is the difference between force due to gravity and acceleration due to gravity?(Please explain theoretically.)

Q. We say that 50kg is ​​​​​​my Weight ​​​​​​but what it is actually , my weight or my mass(PLEASE EXPLAIN)?

Q. How is f is directly proportional to 1\r^2 derived

Q.

Why does the person at poles have heavier or more weight than near the equator

Q.

How much gravitational force acts between two people of mass 60 kg each sitting at distance of 1 m apart?

1. 2.4 × 10^-7 N

2. 2.4 × 10^-8 N

3. 2.4 × 10^-9 N

4. 2.4 × 10^-6 N

Q. Apparent weight

Q.

How do you define mass and weight? Describe their characteristics.

Q.

The quantity of matter in a body regardless of its volume or of any force acting on it is called its

1. Mass

2. Weight

3. Density

4. Relative density

Q.

The mass of an object is

1. measured by its inertia

2. constant at all places

3. scalar quantity

4. vector quantity

Q.

A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is:

1. 15 cm

2. 15 m

3. 1.5 cm

4. 1.5 mm

Q.

Mass is a ______ quantity and weight is a ______ quantity.

Q.

A stone resting on the ground and has gravitation of 20 Newton acting on it. What is the weight and what is the mass of the stone?

Q. 1. What is the mass of an object whose weight is 49 N?
2.State three Kepler's law of planetary motion.
[5 MARKS]

Q.

Mass and weight have same units.

1. True
2. False

Q. What is apparent weights?

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Q. A body weighed 250 N on the surface of earth. Assuming the earth to be a sphere of uniform mass density, how much would it weigh half way down to the centre of earth?

Q. If a body of mass m is taken to the bottom of a deep mine, then its ___.

1. mass increases
2. mass decreases
3. weight increases
4. weight decreases

Q. The weight of a standard mass of 1 kg is found to be 1.7 N when it is measured using a spring balance on the moon. Next, an object of unknown mass is attached to the same spring balance, after removal of the standard mass. The new mass is found to weigh 5.1 N on the moon. What is the mass of the object?

1. 4 kg
2. 2.5 kg
3. 3 kg
4. 2 kg

Q. What is the weight of a block of mass 5 kg at the center of the earth?

1. 50 N
2. 100 N
3. 0 N
4. 8.3 N

Q. A boy has a mass of 50kg. What would be his weight on the Earth? $(g=10m/{sec}^2)$​

1. 500 N

2. 600 N

3. 700 N

4. 800 N