P6 REV

Which of the following quantities remain/s constant all throughout a projectile's flight?

I. horizontal velocity II. vertical velocity III. acceleration  IV. time

• I and II only

• I only

• I and IV only

• III and IV only

Jev threw the javelin at an angle of 30^o from the horizontal. Pau, on the other hand, threw the javelin at an angle of 50^o from the horizontal. If the two athletes threw the javelin with the same initial velocity, which of the following statements is TRUE?

• Jev's javelin will reach a farther distance.

• Pau's javelin will reach a lower height.

• Both javelins will land at the same point.

• Jev's javelin will spend a longer time in air.

A projectile's velocity is lowest at the top of its path.

• TRUE

• FALSE

The vertical component of a projectile's motion is ______ on the horizontal component.

• DEPENDENT

• NOT DEPENDENT

An object in uniform circular motion has a constant VELOCITY.

• TRUE

• FALSE

An object in uniform circular motion has a constant _____.

• VELOCITY

• SPEED

The acceleration of an object in uniform circular motion is parallel to the velocity.

• TRUE

• FALSE

The acceleration of an object in uniform circular motion is ______ to the velocity.

• PARALLEL

• PERPENDICULAR

• CORALINE

• GRAVIMETRIC

You are holding a book inside a moving Lamborghini Aventador . When the vehicle suddenly stopped, you accidentally lost hold of the book. In which direction will it fly off?

• upward

• downward

• forward

• either left or right

A bus travels at constant velocity. What is the net force on the car?

• zero

• negative

• positive

• 7 mmol/L