Physics Finals Sem 2 Review

What is the mass of a rock if it has a downward force of 49 N acting on the ground?

• 480-kg

• 49-kg

• 5-kg

• 9.8 m/s2

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The acceleration due to gravity on Mars is 3.4 m/s². This is less than the Earth’s acceleration due to gravity because...

• Earth is farther from the sun

• Mars is closer to the sun

• Mars is less massive

• Mars is more massive

Tags

NGSS.MS-PS2-4

In the absence of air resistance, Lilla drops a 5-kg pumpkin from apartment A at the same time that Savannah drops a 2-kg squash from apartment B. Which one will hit the sidewalk first?

• both at the same time

• neither one will hit the ground

• pumpkin A

• squash B

Tags

NGSS.MS-PS2-4

Which one of the following does not have an impact on gravitational potential energy (U)? Remember that U=mgh

• Mass of an object

• Weight of an object

• Height of an object

• Speed of an object

Suppose you are jumping on a trampoline. At the top of your jump, which of these is true?

• the mechanical energy is zero

• the potential energy is at a maximum

• the kinetic energy is at a maximum

• the potential energy is zero

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

In a hair dryer, electrical energy is changed into which type of energy that is used to dry your hair?

• Light

• Nuclear

• Thermal

• Chemical

Tags

NGSS.MS-PS1-4

When is the potential energy the greatest in a roller coaster?

• At the bottom of the first hill

• At the top of the first hill

• At the top of the second hill

• Before the ride begins

Tags

NGSS.MS-PS3-2

What is the kinetic energy of a 2,000 kg bus that is moving at 30 m/s?

• 600,000 J

• 300,000 J

• 800,000 J

• 900,000 J

Tags

NGSS.MS-PS3-1

Taylor is skating on ice at Centennial Park. In which of the following is she NOT accelerating?

• going straight at constant speed

• going straight while slowing down

• going straight while speeding up

• making circles at constant speed

Sound travels at a speed of 330 m/s. If John hears a police siren 165.0 meters away, how long did it take for the sound to travel from the police siren to his ear?

• 0.50 sec

• 2.0 sec

• 20.0 sec

• 5.00 sec