29 Questions
Which equation is used to calculate work done?
Work = force x distance
What is the SI unit of force?
Newton
Which concept involves resolving a force into its perpendicular components?
Centripetal Force Principle
What does the moment of force or torque represent?
Distance from pivot to line of action of force
How is atmospheric pressure measured using the height of a liquid column?
By considering the weight of the liquid column
What principle is involved in solving problems related to freely falling bodies?
Acceleration due to Gravity Principle
Which of the following statements accurately describes the interpretation of displacement-time and velocity-time graphs for objects moving along a straight line?
A negative slope on a velocity-time graph indicates that the object is decelerating.
Which of the following factors does NOT affect the friction between a vehicle's tires and the road surface?
The vehicle's color
In the context of freely falling bodies, what is the acceleration due to gravity near the Earth's surface?
$10 \text{ m/s}^2$
Which of the following statements accurately describes Newton's laws of motion?
All of the above statements are correct.
What is the definition of the moment of force or torque?
Torque = force × perpendicular distance from the pivot to the line of action of force
Which of the following statements accurately describes the variation of the acceleration due to gravity (g) with altitude?
The value of g decreases with increasing altitude from the Earth's surface.
What is the primary characteristic of heat of fusion and heat of vaporization?
They occur with a change in the phase of the substance, but without a change in temperature.
Which of the following factors does NOT affect the transfer of heat through solid conductors?
The type of material the conductor is made of.
In the context of thermal energy transfer, what is meant by a 'region of higher temperature'?
A region with a higher kinetic energy of particles.
Which of the following equations correctly represents the motion of a body moving with uniform acceleration in a straight line?
v = u + at, s = ut + (1/2)at^2
According to the law of conservation of momentum, what happens to the total momentum of an isolated system before and after a collision?
The total momentum is always conserved.
Which of the following statements correctly describes Pascal's law?
Pressure exerted on an enclosed fluid is transmitted equally in all directions.
What is the work done by the girl in pulling the baby cart through 35 m while applying a force of 150 N?
$5,250 J$
Which of the following graphs correctly represents the motion of the ball thrown vertically upwards and returning to the ground after 10 seconds?
A parabolic graph with a maximum point at the highest point of the ball's trajectory
Why are worn-out tires not safe to use on wet roads?
Worn-out tires have less tread depth, reducing the ability to grip the road and increasing the risk of hydroplaning on wet surfaces.
What is the effect on a person sitting inside a bus when the bus takes a sudden turn to the left?
The person will be pushed towards the right side of the bus due to inertia.
What is the formula for torque, and what is its SI unit?
Torque = $\tau = rF\sin\theta$, SI unit: Newton-meter (Nm)
At what altitude would the value of 'g' (acceleration due to gravity) become one-ninth of its value at the Earth's surface?
Approximately 36,000 km above the Earth's surface
What is the second equation of motion for a uniformly accelerated body?
$2as = v^2 - u^2$
According to the law of conservation of momentum, if an object of mass m1 moving with velocity u1 collides with another object of mass m2 moving with velocity u2, what is the expression for the recoil velocity of the gun after firing?
$v_r = \frac{m_2u_2 - m_1u_1}{m_1 + m_2}$
If a force F makes an angle with the x-axis, what are the perpendicular components of the force along the x and y axes?
F cos along x-axis, F sin along y-axis
According to Newton's law of gravitation, if the mass of the Earth is M and the radius of the Earth is R, what is the expression for the mass of the Earth?
$M = \frac{gR^2}{G}$
According to Pascal's law, what is the principle behind the working of a hydraulic press, which is also known as a force multiplier?
Pressure exerted at any point in a confined incompressible fluid is transmitted equally in all directions.
Solve physics problems involving work done, maximum height, and safety considerations related to worn out tires. Understand how to calculate work done by a force, maximum height reached by a ball, and why worn out tires are unsafe on wet roads.
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