Physics SEM 1 Final Review

Velocity is to speed as displacement is to

• acceleration

• time

• momentum

• distance

After a cannonball is fired into friction less space, the amount of force needed to keep it going at a constant speed equals

• zero, since no force is necessary to keep it moving

• the same amount of force with which it was fired

• One half the force with which it was fired

• twice the force with which it was fired

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Which body is in equillibrium?

• a satellite orbiting Earth in a circular orbit

• a ball falling freely towards the surface of Earth

• a car moving with uniform motion along a straight, level road

• a projectile at the highest point in its trajectory

The acceleration due to gravity on Mars is 3.7 m/s2. On Mars, an apple would weigh

• more than on Earth

• Less than on Earth

• the same as on Earth

• zero

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Object A weighs 30 N on the Earth. Object B weighs 30 N on the moon. Which object has the greater mass?

• Object A

• Object B

• Both have the same mass

• Impossible to determine

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

A ball is dropped from a person's hand and falls to Earth. Identify an action-reaction pair in this situation.

• The hand exerts a force on the ball; Earth exerts a force on the hand

• Earth exerts a force on the ball; the hand exerts a force on the Earth

• Earth exerts a force on the hand; the hand exerts a force on the ball

• Earth exerts a force on the ball; the ball exerts a force on Earth

A car converts approximately 20% of the chemical potential energy in gasoline to mechanical energy. What happens to most of the remaining 80% of energy supplied by the gasoline?

• It is lost

• It is converted to potential energy

• It is converted to thermal energy

• It is converted to light energy

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NGSS.HS-PS3-4

Two students sit 1 meter apart. How will the gravitational force between them change if htey move to a distance of two meters apart?

• double the force

• 4 times the force

• half the force

• one forth the force

Tags

NGSS.HS-PS2-4

A satellite moves at constant speed of 8 km/s in orbit around Earth. Which of the following is the centripetal force responsible for keeping the satellite in orbit?

• Inertia

• there is no force needed to keep the satellite in orbit

• gravitational force

• frictional force

Tags

NGSS.HS-PS2-4

Which of the following is an example of circular motion?

• a merry-go-round

• a person diving into a pool from a diving board

• a person riding a merry-go-round

• the pendulum on a grandfather clock