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According to Newton's 1st law of motion, a body continues in its state of rest or motion with constant speed in a straight line unless it is affected by an external force. This applies to a body that is:
According to Newton's 1st law of motion, a body continues in its state of rest or motion with constant speed in a straight line unless it is affected by an external force. This applies to a body that is:
In the context of Newton's 2nd law of motion, whenever a force is acting on a body, it accelerates in the same direction of the force. This best describes the behavior of a body when:
In the context of Newton's 2nd law of motion, whenever a force is acting on a body, it accelerates in the same direction of the force. This best describes the behavior of a body when:
A 50 kg lamp is hung from a cord. What horizontal force is needed to keep it in equilibrium at an angle of 20° with the vertical? This scenario relates to:
A 50 kg lamp is hung from a cord. What horizontal force is needed to keep it in equilibrium at an angle of 20° with the vertical? This scenario relates to:
A 4 kg object has a velocity of (3i) m/s. Eight seconds later, its velocity has increased to (8i -10j) m/s. Find the components, magnitude, and direction of the force acting on this object. This situation is an example of:
A 4 kg object has a velocity of (3i) m/s. Eight seconds later, its velocity has increased to (8i -10j) m/s. Find the components, magnitude, and direction of the force acting on this object. This situation is an example of:
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A person weights a fish on a spring scale attached to the ceiling of an elevator. If the mass of the fish was originally 2 kg, what will be its weight if the elevator accelerates at 3m/s^2? This problem deals with determining the fish's weight when the elevator accelerates:
A person weights a fish on a spring scale attached to the ceiling of an elevator. If the mass of the fish was originally 2 kg, what will be its weight if the elevator accelerates at 3m/s^2? This problem deals with determining the fish's weight when the elevator accelerates:
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Study Notes
Newton's First Law of Motion
- A body remains at rest or continues moving with constant speed in a straight line unless acted upon by an external force.
- Illustrates the concept of inertia, where an object's motion is unchanged unless influenced externally.
Newton's Second Law of Motion
- Describes how acceleration is produced when a force acts on a body.
- The acceleration occurs in the same direction as the applied force, emphasizing the relationship between force, mass, and acceleration.
Equilibrium of Forces
- In a scenario where a 50 kg lamp is hung at a 20° angle from the vertical, the horizontal force required to maintain equilibrium can be calculated.
- This situation exemplifies the balance of forces where net force equals zero, enabling the lamp to remain stationary.
Force Calculation Example
- A 4 kg object experiences a change in velocity from (3i) m/s to (8i - 10j) m/s over eight seconds.
- The change in velocity indicates the presence of a net force acting on the object, allowing for the determination of force components, magnitude, and direction using the formula F = ma.
Weight in Accelerating Systems
- Weight of a 2 kg fish changes in an elevator accelerating at 3 m/s².
- Weight can be determined using the equation W = mg, where the effective weight will vary due to acceleration, illustrating the impact of external conditions on weight measurements.
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Description
Test your knowledge of Newton's laws of motion, acceleration, velocity, and forces with this quiz prepared by Dr. Emad Sayed.
