Physics

Which of the following situations describes inertia?

A moving object tends to resist a change in speed and direction, while a resting object tends to resist being moved.

A force unit is defined as the product of a mass unit and a unit of

Acceleration

A satellite is in orbit around the earth. Which one feels the greater force?

Earth and the satellite feel exactly the same force.

A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force to the box's push on the table is the table's push on the floor.

False

In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV.

False

In order to get an object moving, you must push harder on it than it pushes back on you.

False

An action exerted on an object which may change the object's state of rest or motion defines

Force

Units that measure weight are units of

Force

Which of the following statements are true about the concept of field forces? I. Field forces can be exerted by objects that are in physical contact. II. Field forces can be exerted by objects that are not in contact. III. There are four fundamental field forces.

I,II,III

Which of the following is the tendency of an object to maintain its state of motion?

Inertia

An object of mass m rests on a flat table. The earth pulls on this object with a force of magnitude mg. What is the reaction force to this pull?

The object pulling upward on the Earth with force mg.

If you pound a feather with a hammer, which one feels a greater force?

The size of the force is always exactly the same on both of them.

A small car and a large SUV are at a stoplight. The car has a mass equal to half that of the SUV, and the SUV can produce a maximum accelerating force equal to twice that of the car. When the light turns green, both drivers push their accelerators to the floor at the same time. Which vehicle pulls ahead of the other vehicle after a few seconds?

Tie

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest at 15° away from the vertical toward the front of the plane. Using this observation, you can conclude that the airplane is

accelerating backward.

The gravitational force exerted on an object would most likely be represented by which force vector?

⬇️