Exam 2: Motion

A car travels at a constant speed of 95.0 km/h around a circular track with a diameter of 1.00 km.What is the magnitude of the car's centripetal acceleration,and what supplies this?

An ant on a picnic table travels 30 cm eastward,then 15 cm northward,then 20 cm westward,and finally 15 cm southward.What is the magnitude of its net displacement?

The following data refer to a car traveling west: t (s) 0 1 2 3 4 -------------------------- v (m/s)30 25 20 15 10 ​ Find the magnitude and direction of the acceleration.

An object with a mass of 5 kg is dropped and takes 9 s to hit the ground.Then another object with a mass of 10 kg is dropped from the same point.How long does it take to hit the ground?

Free-fall motion neglects ______________.

The direction of the acceleration of an object moving in a circle at constant speed is

For there to be an acceleration,there must necessarily be a change in ______________.

For an object in uniform circular motion,the acceleration points toward ______________.

A rock dropped down a well takes 1.8 s to hit the water.How far below the top of the well is the surface of the water?

On the Moon,what is the approximate value for the acceleration due to gravity?

Distance covered per unit of time is called

The following are data for an accelerating car: t (s) 0 5 10 15 20 ------------------------ v (m/s)0 3 6 9 12 a. Is this car undergoing uniform acceleration? b. If so, what is the acceleration?

A stone is dropped from the top of a well that has water in it at a depth of 30.0 m.How long does it take the stone to reach the water?

At the maximum height of a projectile launched at an angle to the horizontal,the projectile's velocity is in a ______________ direction.

An object in uniform circular motion has

Because of air resistance,an object falling a great distance may reach a ______________ velocity.

A ball is thrown up in the air with an initial velocity of 58.8 m/s upward.How long does it take the ball a. to go up? b. to come down after reaching maximum height?

In straight-line motion,if a moving object slows down,the direction of the acceleration is ______________ the direction of the velocity.

Temperature is an example of a(n)______________ quantity.

What is the displacement of a hiker who travels 3.0 km east and then 4.0 km north?