SAP2 Test 1 Remediation #2

Both objects travel at the same speed of 10 m/s. Which object has more kinetic energy?




Answer: A

• A) The one with greater mass

• B) The one with smaller mass

• C) Both have the same kinetic energy

• D) The one with more surface area

Answer explanation

Kinetic energy is given by the formula KE = 0.5 * mass * velocity^2. Since both objects travel at the same speed, the object with greater mass will have more kinetic energy. Thus, the correct answer is A.

Tags

NGSS.MS-PS3-1

Two cars are moving at the same speed. Car A has a mass of 800 kg and Car B has a mass of 1200 kg. Which car has more kinetic energy?

• A) Car A

• B) Car B

• C) Both have the s

• D) Not enough informationame

Answer explanation

Kinetic energy is calculated using the formula KE = 0.5 * mass * velocity^2. Since both cars are moving at the same speed, Car B, with a greater mass of 1200 kg, has more kinetic energy than Car A, which has a mass of 800 kg.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

An object of mass 5 kg moves at 10 m/s. Another object of mass 10 kg also moves at 10 m/s. Which object has more kinetic energy?

• A) The 5 kg object

• B) The 10 kg object

• C) Both have equal energy

• D) Cannot be determined

Answer explanation

Kinetic energy is calculated using the formula KE = 0.5 * m * v^2. For the 5 kg object, KE = 0.5 * 5 * 10^2 = 250 J. For the 10 kg object, KE = 0.5 * 10 * 10^2 = 500 J. Thus, the 10 kg object has more kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Which factor increases an object’s kinetic energy more significantly?



Answer: B

• A) Doubling its mass

• B) Doubling its speed

• C) Halving its speed

• 
  D) Keeping speed and mass constant

Answer explanation

Kinetic energy is given by the formula KE = 1/2 mv². Doubling the speed (B) increases the kinetic energy by a factor of four (since speed is squared), while doubling the mass (A) only doubles it. Thus, B is the correct choice.

Tags

NGSS.MS-PS3-1

5.

Two balls of equal mass are rolling. Ball A rolls at 6 m/s, and Ball B at 3 m/s. Which has more kinetic energy?

• A) Ball A

• B) Ball B

• C) Both are equal

• D) Cannot be determined

Answer explanation

Kinetic energy is calculated using the formula KE = 0.5 * m * v^2. For Ball A (6 m/s), KE = 0.5 * m * (6^2) = 18m. For Ball B (3 m/s), KE = 0.5 * m * (3^2) = 4.5m. Thus, Ball A has more kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

6.

Two trucks, both traveling at 15 m/s, have different masses. Truck A is 2000 kg, Truck B is 3000 kg. Which has more kinetic energy?

• A) Truck A

• B) Truck B

• C) Both are equal

• D) Need their acceleration to determine

Answer explanation

Kinetic energy (KE) is calculated using the formula KE = 0.5 * mass * velocity^2. Truck B, with a mass of 3000 kg, has more kinetic energy than Truck A (2000 kg) since both have the same velocity of 15 m/s.

Tags

NGSS.MS-PS3-1

Two objects move at the same speed of 10 m/s. Object A has a mass of 2 kg, and Object B has a mass of 5 kg. Which has more kinetic energy?

• A) Object A

• B) Object B

• C) Both have the same

• D) Cannot be determined

Answer explanation

Kinetic energy (KE) is calculated using the formula KE = 0.5 * mass * velocity^2. For Object A (2 kg) KE = 0.5 * 2 * (10^2) = 100 J. For Object B (5 kg) KE = 0.5 * 5 * (10^2) = 250 J. Thus, Object B has more kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Two friends ride bikes at the same speed. One bike has a heavy trailer attached. Who has more kinetic energy?

• A) The friend without the trailer

• B) The friend with the trailer

• C) Both have equal energy

• D) It depends on the type of road

Answer explanation

Kinetic energy depends on mass and speed. The friend with the trailer has more mass, thus more kinetic energy, even though both ride at the same speed. Therefore, the correct answer is B) The friend with the trailer.

Tags

NGSS.MS-PS3-1

Which object has more kinetic energy if both move at 10 m/s?

• A) 1 kg object

• B) 3 kg object

• C) 5 kg object

• D) 0.5 kg object

Answer explanation

Kinetic energy is calculated using the formula KE = 0.5 * mass * velocity^2. At 10 m/s, the 5 kg object has more kinetic energy (250 J) compared to the others, making it the correct choice.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Two balls move at the same speed of 10 m/s. Ball A has a mass of 4 kg and Ball B has a mass of 6 kg.
Which ball has more kinetic energy?

• A) Ball A

• B) Ball B

• C) Both have the same

• D) Cannot be determined

Answer explanation

Kinetic energy is calculated using the formula KE = 0.5 * mass * velocity^2. For Ball A (4 kg) KE = 0.5 * 4 * (10^2) = 200 J. For Ball B (6 kg) KE = 0.5 * 6 * (10^2) = 300 J. Thus, Ball B has more kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4