Review module II

Who was the first one to suggest the concept of gravity

• Newton

• Galileo Galilei

• Maxwell

• Einstein

Which is the value of gravity in free fall

In free fall a positive velocity means that a body is moving __________

• Upwards

• downwards

In free fal we assume that the initial velocity of the object is zero?

• False

• True

In free fall the gravity must be ______

• positive

• negative

• both

Which is the difference between free fall and vertical throw directed downwards

• The final velocity

• the time

• the initial velocity

• the gravity

In vertical throw directed upwards, the time of the ball going up is the same time of __________

• the ball going down the final position

• the ball going down the initial position

• the ball going up

In vertical throw directed upwards, the velocity of the ball when it returns to initial position is the same but with negative sign?

• True

• false

In projectile motion the angle of launch will be

• greater than 0 but less than 45

• greater than 0 but less than 180

• greater than 0 but less than 90

• between 45 and 90

In projectile motion we have always two components in velocity, the velocity in X and the velocity in Y.

• TRUE

• FALSE