Which of the following is the rate of work per unit of time?

• Power

• Energy

• Metabolic rate

• Acceleration

When can we say that there is work done?

• When there is a change in kinetic energy

• When the kinetic energy remains constant

• When the energy is destroyed

• When the energy is stored

Which of the following refers to the average position of all the parts of the system, weighted according to their masses?

• Centroid

• Central Gravity

• Center of mass

• Centripetal force

Which of the following fully describes the momentum having a mass of 10kg with a velocity of 5m/s, going East?

• 2kg.m/s, East

• 50kg.m/s, East

• 5kg.m/s, East

• 10kg.m/s², East

In an isolated system, the momentum of two objects before and after the collision is _____.

• Zero

• The same

• increased

• decreased

How can you describe the magnitude of the horizontal component of a projectile launched both horizontally and at an angle?

• Zero

• It's changing

• it's increasing

• It remains constant

In a projectile launched at an angle, due to the influence of gravity, by how much can the magnitude of the vertical component increase every second?

• 10m/s/s

• 19.6m/s/s

• 9.8m/s/s

• 1m/s/s

What is the horizontal velocity of a projectile if it has an initial speed of 15m/s at an angle of 45 degrees?

• 7.99m/s

• 9.77m/s

• 8.98m/s

• 7.88m/s

When done in an open space, what causes the feather to hit the ground slower compared to a hammer when they are dropped simultaneously?

• Acceleration due to gravity

• Tension

• The difference between their masses

• Due to air resistance

Which of the following formulas is correct?

• K.E. = 1/3 mv²

• W = F.d/t

• G.P.E = mg

• P = W/t