Grade 10 (Alberta) Physics Problems

Kevin throws a ball 100m across the EW Pratt football field. If the ball was in the air for 4sec before it hit the ground, what was the average speed of the ball?

• 50.0 m/s

• 5.0 m/s

• 25.0 m/s

• 2.5 km/h

______________ does not reveal about the direction of the motion. To describe how fast an object moves and the direction of its motion, we need the vector concept of _____________

• speed , velocity

• distance , time

• speed , time

• displacement, velocity

Energy is frequently defined as the ability to do work.

• true

• false

The first law of thermodynamics states that

• components of a system interact.

• entropy of a closed system always increases.

• a closed system always shifts toward disorder or homogeneity.

• energy is always conserved.

Tags

NGSS.MS-PS3-5

Lashanda pushes Anna with 1000N of force, causing Anna to fly backwards a distance of 5m. How much work did Lashanda do?

• None. Anna did all the work.

• 5000J

• 200J

• This question is sus. Will Lashanda be suspended if we answer?

Tags

NGSS.MS-PS3-5

Carter and Josh decide to race their Lambos down main street. Whoever accelerates faster wins 5 Dogecoin. Bost start at rest. Carter crosses the finish line at a speed of 55m/s in 10 sec. Josh crosses the finish line at 65m/s in 12 sec. Who won the Dogecoin?

• Carter

• Josh

Tags

NGSS.MS-PS3-5

Taryn drops a 2kg ball from the roof of the school at a height of 15m. What is the potential energy of the ball as it is dropped? (top)

• 29430J

• 294.3J

• 30J

• 7.5J

Tags

NGSS.MS-PS3-2

Cherry tries to catch the 2kg ball Taryn drops from the 15m roof of EW Pratt, but jumps out of the way before she gets squished. What speed will the ball be travelling at just before it hits the ground? (hint... Ep[top]=Ek[bottom])

•  $75\ \frac{m}{s}$  

•  $7.5\ \frac{m}{s}$  

•  $1.71\ \frac{m}{s^{ }}$  

•  $17.1\ \frac{m}{s^{ }}$  
  

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Chad drops a 150g chocolate bar out of his private jet at a height of 1km. How much energy will it release when it hits the ground? (hint: don't forget conversions)

• 1.47 Joules

• 150 Joules

• 1472 Joules

• About 10 million Snickers worth?

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Which of the following situations does NOT represent a type of potential energy building up?

• Thomas compresses a giant spring to launch himself to the moon.

• Cayden rolls a boulder up a tall hill and leaves it on the edge of a cliff, 100 feet above the ground.

• Gracie dams up the stream by her house and watches as the water gathers higher and higher behind the dam.

• Mr. Barry crashes his helicopter into the ground, causing a huge explosion.

Tags

NGSS.MS-PS3-2