Phy Exm

Which of the following statements best define the concept of gravitiy force ?

• Gravity is not a vector quantity

• Gravity is a noncontact force

• Gravity is the attractional force between all objects

• Gravity has magnitude and direction

Calculate the mass?

• 2.04 kg

• 196 kg

• .49 kg

• 204 kg

You have two magnets. You place the south pole of one magnet near the north pole of the other magnet. The magnets quickly move toward each other.

• None

• 1st Law

• 2nd Law

• 3rd Law

What is the net force on the ball and which direction will it move ?

• 20N-South

• 90N-West

• 60N-North

• 150N-East

What is the distance and displacement if you move through points A➡B➡D ?

• Distance=40 , Displacement=2.05

• Distance=10 , Displacement=7.07

• Distance=5 , Displacement=2.5

• Distance=5 , Displacement=25

You ride in a car. The car makes a sharp left turn. Your body leans to the right as the car turns.

• 1st Law

• 2nd Law

• 3rd Law

• None

Thomas, on his lunch break, took 30 min to go to the library and then the cafe. What was the velocity of Thomas in m/s, during the 30 min ?

• .5 m/s

• 1.5 m/s

• 1.05 m/s

• 6.3 m/s

What is the velocity of a plane in mph, that travels 5000 miles north followed by 10000 miles north in 20 hours ?

• 750 mph

• 500 mph

• 250 mph

• 1000 mph

Choose the correct option for the units of the following quantities in order :

Energy-velocity-distance-mass-weight-time

• second-meter-kilogram-Newton-joule-meters per second

• joule-meters per second-meter-kilogram-Newton-second

• joule-meters per second-Newton-kilogram-meter-second

• joule-meters per second-meter-kilogram-second-Newton

Which option gives the correct words in order ?

I. The [......1.....] of an object tells us how much [....2....] the object has in it. The SI unit is [...3...] and it is a [.....4.....] quantity because only has magnitude and not direction. The mass of an object [....5....] depend on where the object is. But, what does it meant to you ? If the mass of rocket on the Earth is 1000kg its mass in the Moon, in Mars and in the empty space will [......6.....] .

II. The [....7....] of an object is the [.....8.....] acting on it due to [....9....] . The SI unit is [..10..] and is a [....11....] quantity because it has both magnitude and direction. The weight of an object [....12....] depend on where it is. But, what does it meant to you ? If the gravity in planet ¨X¨ is twice the one in planet ¨Y¨ the same 1000kg rocket will weigh the same in both planets? [....13...]

• mass-matter-kg-scalar-doesnt-be the same-weight-force-gravity-N-vector-does-no

• mass-matter-kg-scalar-doesnt-be the same-vector-does-no-weight-force-gravity-N

• mass-matter-kg-scalar-doesnt-be the same-does-no-weight-force-gravity-N-vector

• mass-matter-kg-scalar-doesnt-be the same-gravity-N-vector-does-no-weight-force