ALTS- Class-8- Force & Newton's Laws of motion - 1

Displacement is a

• 1. Scalar quantity
• 2. Vector quantity
• 3. Base quantity
• 4. Derived quantity

A boy of mass 50 kg runs with a force of 100 N, his acceleration would be

• 1. 5000 m s-2
• 2. 50 m s-2
• 3. 150 m s-2
• 4. 2 m s-2

SI unit for force is

• 1. Kilograms
• 2. Newton
• 3. Joules
• 4. acceleration

Adding of two vectors to get a single vector is termed as

• 1. Final vector
• 2. Resultant vector
• 3. Dominant vector
• 4. Recessive vector

In scalar, there is only addition and subtraction of

• 1. Number
• 2. Number according to direction
• 3. Number according to unit
• 4. 2 and 3 both

Newton's first law is also known as

• 1. Law of inertia
• 2. Law of momentum
• 3. Law of forces
• 4. Law of zero

Formula of force is

• 1. F = P/A, where P is pressure and A is area
• 1. F = P/A, where P is pressure and A is area
• 3. F = ma, where m is mass and a is acceleration
• 4. F = m/v, where m is mass and v is velocity

Volume is a

• 1. Scalar quantity
• 2. Vector quantity
• 3. Base quantity
• 4. Derived quantity

Type of force that opposes motion and releases thermal energy is termed as

• 1. resistance
• 2. Tension
• 3. Weight
• 4. Friction

If two forces of 20 N towards north and 12 N towards south are acting on an object. resultant force will be

• 1. 32 N toward north
• 2. 20 N towards north
• 3. 32 N towards south
• 4. 8 N towards north