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1.1 Forces F₁ and F₂ are applied simultaneously on a crate of mass 1 kg - NSC Technical Sciences - Question 1 - 2024 - Paper 1
Question 1
1.1 Forces F₁ and F₂ are applied simultaneously on a crate of mass 1 kg. The crate accelerates to the right on a frictionless surface, as shown in the diagram below.... show full transcript
Worked Solution & Example Answer:1.1 Forces F₁ and F₂ are applied simultaneously on a crate of mass 1 kg - NSC Technical Sciences - Question 1 - 2024 - Paper 1
Step 1
Which ONE of the following is CORRECT about the magnitudes of F₁ and F₂?
Answer
Given that the crate is accelerating to the right on a frictionless surface, we can apply Newton's second law, which states:
Where:
- is the net force acting on the crate.
- is the mass of the crate (1 kg).
- is the acceleration.
Since the crate is accelerating to the right, the net force must also be to the right. This implies that the magnitude of the force applied to the right (F₂) must be greater than the force applied to the left (F₁) to create this acceleration. Therefore, we conclude that:
Thus, the correct answer is option A.
Step 2
1.2 Frictional force acts in the …
Answer
The correct assertion about the direction of the frictional force is:
- Frictional force always acts in the direction opposite to that of the motion of an object.
Thus, the correct answer is:
B opposite direction to the direction of motion of an object and perpendicular to the surface the object is in contact with.
Step 3
1.3 The impulse of a ball bouncing off a wall is equal to …
Answer
Impulse is defined as the change in momentum of an object when a force is applied over a period of time. When a ball bounces off a wall, the impulse delivered to the ball equals the change in its momentum.
Therefore, the correct answer is:
A change in its momentum.