When calculating gravity between two objects, the distance should be measured between

The outside edges of both objects

The inside edges of both objects

The center of one object to the edge of the other object

Why does an astronaut weigh less on the moon?

The gravitational field strength is less on the moon’s surface than on Earth’s surface.

The astronaut has less mass on the moon.

The astronaut is farther from Earth’s center when he or she is on the moon.

The astronaut is continually in free fall because the moon orbits Earth.

Which of the following statements applies to the motion of a ball rising and then falling in free fall?

4. All of the above apply to this situation.

1. The ball has constant acceleration as it moves upward.

2. The ball has zero acceleration at the very top of its path.

3. The ball has constant acceleration as it moves downward.

Objects that are falling toward Earth in free fall move

1. faster and faster (9.8 m/s2) .

2. at a constant velocity (9.8 m/s2).

3. slower and slower(-9.8 m/s2).

Kepler’s first law states that

planets orbit the sun in elliptical orbits, with the sun located at one focus.

the sun is the center of the solar system.

planets orbit the sun in circular orbits, with the sun located at the center.

gravity provides the force that holds the planets in orbit about the sun.

The size of the gravitational force between two objects depends on their ____.

masses and the distance between them

Kepler’s third law states that the ratio of

the period squared to the radius cubed is the same ratio for all planets.

the orbital period to the orbital radius is the same for all planets.

the orbital periods of any two planets equals the ratio of the orbital radii.

all planets would orbit with the same orbital period.

Satellite B is three times more massive than Satellite A. Which satellite experiences a stronger gravitational attraction with the earth?

A due to its distance from earth

B due to its distance from earth

Which of the following statements is correct about weight and mass?

Weight varies with location,but mass does not.

Mass and weight both vary with location.

Mass varies with location, but weight does not.

Neither mass nor weight varies with location.

Two balls are dropped at the same height. One ball is dropped from table height and the other initially moves horizontally across the table the then falls off the edge, as shown in the figure. If both balls are dropped at exactly the same time, which one will hit the ground first?

Both hit at the same time due to gravity

A because it has a shorter distance to fall.

B because is is already travelling down

IF FRICTION IS THE ONLY FORCE ACTING ON AN OBJECT DURING A GIVEN PHYSICAL PROCESS, WHICH OF THE FOLLOWING ASSUMPTIONS CAN BE MADE IN REGARD TO THE OBJECT’S KINETIC ENERGY?

The kinetic energy remains constant.

The kinetic energy decreases and then increases.

WHICH OF THE FOLLOWING IS TRUE?

A body with zero velocity cannot have any kinetic energy.

A body with zero velocity cannot have any potential energy.

A body with zero acceleration cannot have any kinetic energy.

A body with zero acceleration cannot have any potential energy

WHICH OF THE FOLLOWING IS A TRUE STATEMENT ABOUT THE CONSERVATION OF ENERGY?

Total energy is always conserved.

Potential energy is always conserved.

Kinetic energy is always conserved

Mechanical energy is never conserved.

WHICH OF THE FOLLOWING STATEMENTS BEST DESCRIBES THE RELATIONSHIP BETWEEN THE CART’S POTENTIAL ENERGY (PE), KINETIC ENERGY (KE), AND TOTAL MECHANICAL ENERGY (TME)?

As the PE increases, the KE decreases, but the TME remains relatively constant

As the PE increases, the KE and TME are also observed to increase.

The TME increases as the PE increases, but the KE remains relatively constant.

There seems to be no pattern in the manner in which the KE, PE and TME change.

WHICH COMBINATION OF KINETIC ENERGY (KE), POTENTIAL ENERGY (PE) AND TOTAL MECHANICAL ENERGY (TME) VALUES WOULD BE EXPECTED WHEN THE CART IS LOCATED AT A POSITION OF 90 CM (0.90 M) FROM ITS STARTING LOCATION?

KE = 0.43 J, PE = 0.68 J, TME = 1.11 J

KE = 1.80 J, PE = 1.63 J, TME = 3.43 J

KE = 1.63 J, PE = 1.80 J, TME = 3.43 J

KE = 0.26 J, PE = 0.85 J, TME = 1.11 J

Physics fall semester review

Authored by Justine Kramer

Physics

9th Grade

NGSS covered

Used 67+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

WHICH OF THE FOLLOWING SITUATIONS IS AN EXAMPLE OF A SIGNIFICANT CHANGE IN MOMENTUM?

A TENNIS BALL IS HIT INTO A NET.

A HELIUM-FILLED BALLOON RISES UPWARD INTO THE SKY.

AN AIRPLANE FLIES INTO SOME SCATTERED WHITE CLOUDS.

A BICYCLIST RIDES OVER A LEAF ON THE PAVEMENT.

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

THE IMPULSE EXPERIENCED BY A BODY IS EQUIVALENT TO THE BODY’S CHANGE IN

momentum

acceleration

Tags

NGSS.HS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 20 KG SHOPPING CART MOVING AT A VELOCITY OF 0.5 M/S COLLIDES WITH A STORE WALL AND STOPS. THE MOMENTUM OF THE SHOPPING CART

increases

decreases

stays the same

Tags

NGSS.HS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A SOCCER BALL COLLIDES WITH ANOTHER SOCCER BALL AT REST. THE TOTAL MOMENTUM OF THE BALLS

increases

decreases

remains constant

Tags

NGSS.HS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

THE LAW OF CONSERVATION OF MOMENTUM STATES THAT

THE TOTAL INITIAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER USUALLY EQUALS THE TOTAL FINAL MOMENTUM.

THE TOTAL INITIAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER DOES NOT EQUAL THE TOTAL FINAL MOMENTUM.

THE TOTAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER IS ZERO.

THE TOTAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER REMAINS CONSTANT REGARDLESS OF THE NATURE OF THE FORCES BETWEEN THE OBJECTS.

Tags

NGSS.HS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A CHILD WITH A MASS OF 23KG RIDES A BIKE WITH A MASS OF 5.5 KG AT A VELOCITY OF 4.5 M/S TO THE SOUTH. COMPARE THE MOMENTUM OF THE CHILD WITH THE MOMENTUM OF THE BIKE.

The child has a greater momentum because it has a larger mass.

They both have the same momentum

the bike has more momentum.

Tags

NGSS.HS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

CARS ARE EQUIPPED WITH PADDED DASHBOARDS. IN COLLISIONS, THE PADDED DASHBOARDS WOULD BE SAFER THAN NON-PADDED ONES BECAUSE THEY

Increase the impact time

Increase the occupant’s impulse

Decrease impact force

all are true

only A and C are true

Tags

NGSS.HS-PS2-3

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Physics fall semester review

WHICH OF THE FOLLOWING SITUATIONS IS AN EXAMPLE OF A SIGNIFICANT CHANGE IN MOMENTUM?

THE IMPULSE EXPERIENCED BY A BODY IS EQUIVALENT TO THE BODY’S CHANGE IN

A 20 KG SHOPPING CART MOVING AT A VELOCITY OF 0.5 M/S COLLIDES WITH A STORE WALL AND STOPS. THE MOMENTUM OF THE SHOPPING CART

A SOCCER BALL COLLIDES WITH ANOTHER SOCCER BALL AT REST. THE TOTAL MOMENTUM OF THE BALLS

THE LAW OF CONSERVATION OF MOMENTUM STATES THAT

A CHILD WITH A MASS OF 23KG RIDES A BIKE WITH A MASS OF 5.5 KG AT A VELOCITY OF 4.5 M/S TO THE SOUTH. COMPARE THE MOMENTUM OF THE CHILD WITH THE MOMENTUM OF THE BIKE.

CARS ARE EQUIPPED WITH PADDED DASHBOARDS. IN COLLISIONS, THE PADDED DASHBOARDS WOULD BE SAFER THAN NON-PADDED ONES BECAUSE THEY

When calculating gravity between two objects, the distance should be measured between

Why does an astronaut weigh less on the moon?

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

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