Grade 9

What is the path that a projectile follow?

• vertical

• hyperbola

• parabolic

• displacement

The horizontal range cover by a projectile is proportional to _______.

• its velocity

• square of the sine of angle of projection

• square of its velocity

• sine of angle of projection

What is the direction of velocity in the trajectory of a projectile?

• perpendicular to each other

• parallel to each other

• inclined to each other at angle ‘45 degree

• inclined to each other at angle of 60

A soccer ball is thrown upward in the air with an initial velocity of 40m/s at an angle of 30 degrees. How long does it take to reach back to the point bit was thrown from?

• 6 s

• 8 s

• 2 s

• 4 s

Two objects are released from the same height. Object A falls straight down from the cliff and object B follows a curved parabolic path. What is the correct observation?

• A hits the ground before B

• B hits the ground before A

• A and B hit the ground at the same time

• A hits the ground first only if it is heavier than B

Which is NOT be considered a projectile? A ball ___________

• thrown in the air

• thrown straight up

• rolling off a table

• rolling down a slope

A ball is thrown downward from the top of a roof with a speed of 25m/s after 2s, its velocity will be down.

• -5.4 m/s

• -44. 6m/s

• 19.6m/s

• 44.6m/s

A body is projected horizontally from the top of a tower with a speed of 20m/s. After 2 seconds, its velocity will be ________?

• 14 m/s

• 20 m/s

• 28 m/s

• 40 m/s

What is the value of the acceleration due to gravity near the surface of the Earth?

• – 9.8 ft/s²

• – 9.8 m/s²

• 9.8 m/s

• 32.2 ft/s

The acceleration due to gravity acts ____________

• upward

• downward

• toward outer space

• depending on the motion of the object