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Beginner
Conceptual
MCQ

Which pulls harder gravitationally, the Earth on the Moon, or the Moon on the Earth? Which accelerates more?

Intermediate
Mathematical
FRQ

A \( 15 \) \( \text{N} \) force is pushing a \( 40 \) \( \text{N} \) block down a incline. The angle of the inline is \( \alpha = 40^{\circ} \). The coefficient of static friction between the block and the incline is \( \mu_s = 0.75 \) and the coefficient of kinetic friction is \( \mu_k = 0.65 \).

Intermediate
Mathematical
MCQ

A cart starts from rest and accelerates uniformly at \(4.0 \, \text{m/s}^2\) for \(5.0 \, \text{s}\). It next maintains the velocity it has reached for \(10 \, \text{s}\). Then it slows down at a steady rate of \(2.0 \, \text{m/s}^2\) for \(4.0 \, \text{s}\). What is the final speed of the car?

Intermediate
Conceptual
MCQ

In which of these cases is the rate of change of the particle’s displacement constant?

Beginner
Conceptual
MCQ

What does distance represent during any type of motion?

Intermediate
Conceptual
GQ

List at least 2 everyday forces that are not conservative, and explain why they aren’t.

Intermediate
Conceptual
MCQ

The figure shows a truck pulling three crates across a rough road. Which of the following best describes the directions of all the horizontal forces acting on crate 2?

Intermediate
Mathematical
MCQ

When the mass of a simple pendulum is tripled, the time required for one complete vibration

Intermediate
Mathematical
MCQ

A rod of length \( L \) is rotated about its center with \( I = \frac{ML^{2}}{12} \). What is the moment of inertia at either end of the rod?

Intermediate
Mathematical
FRQ

Measurements made in 1910 indicate that the common flea is an impressive jumper, given its size. Assume that a flea’s initial speed is 2.1 m/s, and that it leaps at an angle of 21° with respect to the horizontal. The jump lasts 0.16 s.

Beginner
Conceptual
MCQ

Water flowing in a horizontal pipe speeds up as it goes from a section with a large diameter to a section with a small diameter. Which of the following can explain why the speed of the water increases?

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