For orbits of greater altitude, is the period longer or shorter?

What does Earth’s curvature have in common with the speed needed for a projectile to orbit Earth?

Why is it important that such a satellite be above Earth’s atmosphere?

Why doesn’t the force of gravity change the speed of a bowling ball as it rolls along a bowling lane?

A particle traveling in a straight line is located at the point (1, -1, 2) and has speed 2 at time t = 0. The particle moves toward the point (3, 0, 3) with constant acceleration

$$2 \mathbf { i } + \mathbf { j } + \mathbf { k }.$$

Find its position vector

$$\mathbb {r} (t)$$

at time t.

A particle moves along the top of the parabola

$$y ^ { 2 } = 2 x$$

from left to right at a constant speed of 5 units per second. Find the velocity of the particle as it moves through the point (2, 2).

The impulse-momentum relationship is a direct result of Newton's (a) first law. (b) second law. (c) third law. (d) law of gravity.

An airplane with its nose pointing north with an airspeed of $40 \mathrm{~km} / \mathrm{h}$ in a $30-\mathrm{km} / \mathrm{h}$ crosswind (at right angles) has a groundspeed of (a) $30 \mathrm{~km} / \mathrm{h}$. (b) $40 \mathrm{~km} / \mathrm{h}$. (c) $50 \mathrm{~km} / \mathrm{h}$. (d) $60 \mathrm{~km} / \mathrm{h}$.

The sources of heated water that can affect the marine environment include (choose all that apply)

A. agricultural runoff

B. power plant cooling

C. industrial discharges

D. HABs

How much time does it take for a complete revolution of a satellite in close orbit about the Earth?

A long coaxial cable consists of an inner cylindrical conductor with radius a and an outer coaxial cylinder with inner radius b and outer radius c. The outer cylinder is mounted on insulating supports and has no net charge. The inner cylinder has a uniform positive charge per unit length $\lambda$. Calculate the electric field at any point between the cylinders a distance r from the axis and

Two people of equal mass attempt a tug-of-war with a 12-m rope while standing on frictionless ice. When they pull on the rope, each person slides toward the other. How do their accelerations compare, and how far does each person slide before they meet?

If a Mack truck and a motorcycle have a head-on collision, upon which vehicle is the impact force greater? Which vehicle undergoes the greater change in its motion? Explain your answers.

If a Mack truck and a motorcycle have a head-on collision, on which vehicle is the impact force greater? Which vehicle undergoes the greater change in motion? Explain your answers.