A 12 kg object is at rest. A force of 36 N is applied to it. What will be its ve
Practice Questions
Q1
A 12 kg object is at rest. A force of 36 N is applied to it. What will be its velocity after 3 seconds? (2020)
1 m/s
2 m/s
3 m/s
4 m/s
Questions & Step-by-Step Solutions
A 12 kg object is at rest. A force of 36 N is applied to it. What will be its velocity after 3 seconds? (2020)
Step 1: Identify the mass of the object, which is 12 kg.
Step 2: Identify the force applied to the object, which is 36 N.
Step 3: Use the formula for acceleration, which is Acceleration = Force / Mass.
Step 4: Plug in the values: Acceleration = 36 N / 12 kg.
Step 5: Calculate the acceleration: 36 N / 12 kg = 3 m/s².
Step 6: Identify the initial velocity of the object, which is 0 m/s (since it is at rest).
Step 7: Use the formula for velocity after a certain time, which is Velocity = Initial velocity + (Acceleration × Time).
Step 8: Plug in the values: Velocity = 0 m/s + (3 m/s² × 3 s).
Step 9: Calculate the velocity: 0 m/s + 9 m/s = 9 m/s.
Newton's Second Law of Motion – This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Kinematics – This involves the equations of motion that relate displacement, velocity, acceleration, and time.