1st Summative Assessment Science 8

Which of the following describes inertia?

• An object at rest will remain at rest.

• An object at rest will be in motion.

• An object in motion will be at rest.

• None of the above

Which of the following vehicles has the GREATEST INERTIA considering they all have the same speed?

• Bus

• 10-wheeler truck

• Airplane

• Car

What is the unit of acceleration?

• m/s

• m/s²

• m²/s²

• m²/s³

The unit Newton is equivalent to

• kg.m/s

• kg.m/s²

• kg.m²/s²

• kg.m²/s³

Which of the following is the

formula of force?

• Mass times Acceleration

• Mass divided by Acceleration

• Acceleration divided by Force

• Work divided by time

Earth’s gravity is 9.8

• m/s

• m/s²

• J

• N

Which of the following is the correct formula of Kinetic Energy?

K.E. =

• ¼ mv²

• ½ mv²

• ¼ mv³

• ½ mv³

What will be the force exerted by a

10-kg boy that is running 2 m/s² on a playground?

FORMULA: F = ma

• 5 N

• 20 J

• 5 J

• 20 N

If a 0.5-kg apple on a tree possess 24.5 J, how tall the tree will be?

FORMULA: P.E. = mgh

• 12.25 N

• 5 N

• 12.25 m

• 5 m

If the Ahron, who has 50 J runs 5 m/s, what will be his mass?

FORMULA: K.E. =

 $\frac{mv^2}{2}$  

• 4 kg

• 10 kg

• 4 N

• 10 N