An astrophysicist is studying the motion of satellites and charged particles in space. Write down one type of non-contact force that can act between these objects.
A heavy shipping crate rests on the horizontal deck of a stationary cargo ship. Draw a free-body force diagram to show the forces acting on the crate. Use arrows to represent the forces.
A model maglev cart is at rest on a horizontal, frictionless track. A technician gives the cart a brief horizontal push to start it sliding.
Explain the motion of the cart during and after the push.
A propulsion engineer comments:
"A space probe with less mass can achieve a higher acceleration than a heavier probe when both are subjected to the same constant engine thrust."
Explain why the engineer is correct.
A probe accelerates from 15 m/s to 135 m/s in 8 seconds8\text{ seconds}8 seconds.
Calculate the acceleration of the probe.
Use the equation: Acceleration=Change in speed÷Time taken\text{Acceleration} = \text{Change in speed} \div \text{Time taken}Acceleration=Change in speed÷Time taken