Physics: Units and Measurements

A student measures the length of a table using a meter stick three times and obtains the following measurements: 1.50 m, 1.51 m, and 1.52 m. If the actual length of the table is 1.515 m, which of the following statements is most accurate?

A car accelerates from rest to a velocity of 20 m/s in 5 seconds. What is the average acceleration of the car?

A ball is thrown vertically upwards with an initial velocity of 15 m/s. Neglecting air resistance, what is the approximate maximum height reached by the ball?

Which of the following is an example of a derived quantity?

A projectile is launched at an angle of 30 degrees above the horizontal with an initial velocity of 20 m/s. Assuming negligible air resistance, what is the horizontal component of the projectile's initial velocity?

A 2 kg object is moving with a velocity of 5 m/s. If a force of 4 N is applied in the opposite direction of motion, what is the magnitude of the object's acceleration?

Two objects, one with a mass of 5 kg and another with a mass of 10 kg, are subject to the same force. Which object will experience greater acceleration?

A 0.5 kg ball moving at 4 m/s collides head-on with a stationary 1 kg ball. If the collision is perfectly inelastic (i.e., the balls stick together), what is the final velocity of the combined mass?

A wire carries a steady current of 2A. Calculate the charge that passes through a cross-section of the wire in 4 seconds.

A copper wire has a resistance of 10 ohms. If the length of the wire is doubled while keeping the cross-sectional area constant, what will be the new resistance?

Which of the following statements accurately describes the magnetic force on a moving charge in a magnetic field?

A transformer is used to step down the voltage from 220V to 11V. If the primary coil has 1000 turns, how many turns does the secondary coil have?

Which of the following electromagnetic radiations has the shortest wavelength?

A light ray travels from air into glass. If the angle of incidence is 45 degrees and the refractive index of glass is 1.5, what is the angle of refraction?

In the context of the photoelectric effect, what does the work function of a metal represent?

What is the significance of the de Broglie wavelength?

What type of semiconductor is formed when a pure semiconductor is doped with a pentavalent impurity?

What is the primary function of a transistor in electronic circuits?

A hockey puck slides across an icy surface at a constant velocity. Which statement best describes the forces acting on the puck?

A crane lifts a heavy steel beam at a constant speed. What can be said about the power exerted by the crane?

A figure skater spins faster by pulling their arms closer to their body. Which of the following principles explains this phenomenon?

Two planets have the same radius, but planet A has twice the mass of planet B. If an object is placed the same distance from each planet's surface, how does the gravitational force on the object compare?

A solid metal cube is subjected to pressure from all sides. Which modulus is most relevant to determine the change in its volume?

A closed container of gas is heated. According to the first law of thermodynamics, which statement is true if the volume of the container remains constant?

A mass is attached to a spring and oscillates in simple harmonic motion. At which point in its oscillation does the mass have maximum kinetic energy?

A wave travels from one medium to another, where its speed increases. What happens to the wavelength and frequency of the wave?

Two charged objects are separated by a distance r. If the charge of one object is doubled and the distance between them is also doubled, how does the electric force between them change?

A car accelerates from rest on a level road. What provides the force that propels the car forward?

A simple pendulum is released from an initial angle. During its swing, at what point is the tension in the string greatest?

If the Earth's mass were to double but its radius remained the same, what would happen to the escape velocity from its surface?

A block of material is subjected to a force parallel to one of its surfaces, causing it to deform. Which property of the material is being tested?

An ideal gas expands adiabatically. Which of the following statements correctly describes the relationship between heat transfer (Q) and change in internal energy (ΔU)?

A tuning fork vibrates at a specific frequency, producing a sound wave. If the temperature of the air increases, how will the wavelength of the sound wave change?