Physics

What is the momentum of a cougar with a mass of 120 kg that runs with a velocity of 14 m/s north? (Note: momentum (p) = m * v, and units for p = kg*m/s)

1680 kg*m/s north

A ball that has a mass of 0.25 kg spins in a circle at the end of a 1.6 m rope. The ball moves at a tangential speed of 12.2 m/s. What is the centripetal force acting on the ball?

23 N

A remote-controlled plane has a mass of 0.386 kg and flies in a circle with a radius of 75 m. The centripetal force on the plane is 4.0 N. What is the tangential speed of the plane?

28 m/s

Julius competes in the hammer throw event. The hammer has a mass of 7.26 kg and is 1.215 m long. What is the centripetal force on the hammer when it has a tangential speed of 31.95 m/s? The answer is rounded off to the nearest whole number.

6,100 N

What is the average acceleration of a subway train that speeds up from 9.7 m/s to 16 m/s in 0.9 s on a straight section of track?

7.0 m/s^2

The edge of a flying disc with a radius of 0.13 m spins with a tangential speed of 3.3 m/s. The centripetal acceleration of the edge of the disc is ________ m/s2.

84

The tip of a fan blade is 0.61 m from the center of the fan. The fan turns at a constant speed and completes 2 rotations every 1.0 s. What is the centripetal acceleration of the tip of the fan blade?

96 m/s2

How does a centripetal force cause circular motion?

It acts at a right angle to the object's motion and causes the object to constantly change direction.

Which is a characteristic of centripetal acceleration?

It is directed inward, toward the center of a circle.

An object is in circular motion. How will the object behave if the centripetal force is removed?

It would move in a line tangent to the circular path.

How does an object's motion change as a result of centripetal acceleration?

The direction changes but not the speed.

Suchita makes a table to identify the variables used in the equations for centripetal force. What quantities belong in cells X and Y?

X: radius Y: tangential speed

Which of the following would be a good reference point to describe the motion of a deer?

all of the selections

Which of the following is not an example of acceleration?

an airplane taking off

In which situation would a space probe most likely experience centripetal acceleration?

as it revolves around a planet

Which of the following will increase the acceleration of an object that is pushed by a force? (check all that apply)

decreasing the mass of the object increasing the force pushing the object

When two or more objects collide, momentum may be transferred, but the total amount of momentum does not change. This is ...

law of conservation of momentum

The seasons of the year result from Earth's movement, or _________ , around the Sun.

revolves (revolution)

When is an object moving in uniform circular motion?

when its tangential speed is constant

In a uniform circular motion map, what is always true? Check all that apply.

.

Which motion maps show an object in uniform circular motion? Check all that apply.

.

A coin completes 18 spins in 12 seconds. The centripetal acceleration of the edge of the coin is 2.2 m/s2. The radius of the coin is _______ m.

0.025

A wrecking ball has a mass of 650 kg. It swings from a cable that is 21 m long. The centripetal force on the ball is 56 N. What is the tangential speed of the wrecking ball?

1.3 m/s

A child on a spinning playground ride is 0.36 m from the center of the ride. The centripetal force on the child is 19 N. What is the mass of the child if the child has a tangential speed of 0.54 m/s?

23 kg

Dao makes a table to identify the variables used in the equations for centripetal acceleration. What quantities belong in cells X and Y?

X: tangential speed Y: radius

Which situation during a basketball game involves centripetal acceleration?

A player spins a basketball on his finger.