18 Questions
What is the unit of velocity measurement?
m/s
What is the confidence probability (P) for the given confidence interval of systematic error?
0.95
What is the branch of physics that deals with the motion of material objects and their interaction?
Mechanics
What is the average velocity of a particle defined as?
The ratio of its displacement to the time interval
What is the difference between direct and indirect measurements?
Direct measurements involve the use of instruments, while indirect measurements involve the use of calculations
What is the confidence interval of systematic error (∆с) in the given problem?
1
What is the product of the force and its perpendicular distance from the fulcrum called?
Moment of the force
What is the condition for the plank to be in equilibrium?
Fl1 = Pl2
What is the ratio of Pl2 to F known as?
Mechanical advantage
What is the angle of the biceps muscle to the elbow in the example problem?
12°
What is the force exerted by the biceps muscle in the example problem?
30.7 N
What type of muscle is the biceps in the example problem?
Flexor muscle
What is the tendency of a force to rotate a rigid body about an axis measured by?
Torque
What is the formula for calculating the magnitude of the torque?
τ = rFsinθ
What is the direction of the torque vector?
The direction of a right-handed screw rotated in the direction θ
What is the lever arm of a force?
The perpendicular distance from the rotation axis to the line of action of the force
What is the condition for static equilibrium in terms of torque?
The sum of all torques equals zero
What is the purpose of a lever?
To balance a larger force by a lesser one
This quiz is about the forces acting on a plank in equilibrium, including the downward force, reaction force, and gravitational force. It covers the concept of moment of force and equilibrium. Test your understanding of these fundamental physics concepts!
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