Exam 3: Optics and Wave Effects

An astronaut on the Moon has the same mass as when on Earth,but has a different ____________.

A(n) ______________ force is necessary for uniform circular motion.

What is the purpose of having automobile air bags?

When a net force on a moving object increases, the object will

A student stands on a chair. The forces acting on her or him are supplied by gravity acting downward and by the ______________ acting upward.

Two of your classmates, each 82 kg, are separated by 2 meters. The gravitational force of attraction between them in nano-newtons is

An automobile travels due north with a speed of 92 km/h that is decreasing. All forces considered, the unbalanced force acting on the auto is

If an object on Earth weighs 300 N, what is its weight in pounds?

Jet propulsion can be explained in terms of Newton's third law and the ______________.

On which planet (other than Earth) have air bags been deployed?

A comet is traveling at a speed of 50,000 mi/h when it is 100 million miles from the Sun. Compute its speed when it is 25 million miles from the Sun.

The relationship between mass and weight is given by the equation

Forces always occur in ____________.

a = F/m is a statement of ______________.

An object will ______________ in a fluid if its average density is ______________ the density of the fluid.

The essentials of the first law of motion were initially developed by

A 6.0-kg object exerts a force of 8.0 N on a 2.0-kg object. What is the magnitude of the force on the 6.0-kg object?

A 0.065-kg bullet travels with a velocity of magnitude 90 km/h. What is the bullet's linear momentum?

A stationary but movable 450-kg cannon is fired, and the 12-kg cannonball moves off to the right with a velocity of 20.0 m/s. What is the cannon's velocity (neglecting friction or any restraints)?

Calculate the force on a string tied to a ceiling with a 9.0-kg mass attached.