CUET LEVEL I JEE MOCK TEST -6 Physics (2025-2026)

A quantity is reported as 4.700 m. Which representation maintains the correct precision when converted to cm and expressed in scientific notation?

• 4.70 × 10² cm

• 4.700 × 10³ mm

• 4.700 × 10² cm

• 4.7 × 10² cm

According to the rules for rounding off uncertain digits, how should the number 2.735 be rounded off to three significant figures?

• 2.73

• 2.745

• 2.74

• 2.735

Calculate the volume of a cube with a measured side length of 7.203 m, reporting the result to the appropriate significant figures.

• 373.714754 m³

• 374 m³

• 373.71 m³

• 373.7 m³

For an object in rectilinear motion, when is the instantaneous speed equal to the magnitude of the instantaneous velocity?

• Instantaneous speed is always equal to the magnitude of instantaneous velocity

• Only for uniform motion

• Only when acceleration is zero

• Only when the object moves in the positive direction

An object's position along the x-axis is given by x = a + b t², where a = 8.5 m and b = 2.5 m s⁻². What is the average velocity between t = 2.0 s and t = 4.0 s?

• 10 m s⁻¹

• 15 m s⁻¹

• 20 m s⁻¹

• 5.0 m s⁻¹

A vehicle with initial velocity v₀ is brought to a stop by deceleration −a. If the initial velocity is doubled, by what factor does the stopping distance increase?

• 2

• 1/2

• 4

• √2

An object is moving with speed v = 5.0 m s⁻¹ in a circle of radius R = 2.0 m. What is the magnitude of its centripetal acceleration a_c?

• 2.5 m s⁻²

• 5.0 m s⁻²

• 10 m s⁻²

• 12.5 m s⁻²

According to Galileo's statement regarding projectile range, if a projectile is launched at an angle of 45° + α, what other launch angle will yield the same horizontal range, assuming the initial speed is the same?

• 90° − α

• 45° + 2α

• 90° − 2α

• 45° − α

In uniform circular motion, what characterizes the acceleration vector?

• It is a constant vector because the speed is constant

• It is always tangent to the path

• It has a constant magnitude but continuously changing direction towards the center

• Its magnitude changes inversely with the radius R.

A wooden block (2 kg) rests on a floor. An iron cylinder (25 kg) is placed on top. If they accelerate downward at 0.1 m s⁻² (g = 10 m s⁻²), what is the magnitude of the normal force R' exerted by the floor on the system?

• 270 N

• 267.5 N

• 267.3 N

• 20 N