Kinematics

Rock A is thrown horizontally with a speed of 20 m/s and Rock B is dropped from the same height at the same time.  Which will hit the ground first.

• Rock A
• Rock B
• Both will hit at the same time
• Unable to determine

Tags

NGSS.HS-PS2-4

If you throw a baseball straight up, what is its vertical velocity at the highest point?

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

Tags

NGSS.HS-PS2-1

A 5kg red ball is thrown horizontally at a speed of 4m/s from a height of 4 meters.  A 8kg green ball is thrown horizontally from the same height at a speed of 6m/s.  Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground is which of the following?

• half as much
• twice as much
• four times as much
• the same

Which of the following shapes is seen in the path of  a projectile?

• straight line
• parabola
• circle
• hyperbola

The initial velocity of a projectile has a horizontal component of 5m/s and a vertical component of 6m/s.  At the highest point of the projectile's trajectory what is (A) the horizontal velocity (B) the vertical velocity?

• (A)25m/s, (B) 10m/s
• (A) 5m/s,  (B) 0m/s
• (A) 10m/s, (B) 24m/s
• (A) 0m/s, (B) 3m/s

If you throw a baseball straight up, what is its vertical acceleration at the highest point?

• -9.8 m/s²

• -9.8 m/s

• 0 m/s²

• 0 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The horizontal component of a projectile's velocity is independent of...

• it's range
• time
• the vertical component
• none of these

Which of the following would NOT be considered a projectile? 

• a cannonball thrown straight up
• a cannon ball rolling down a slope
• a cannonball rolling off a table
• a cannonball thrown in the air

What acts on a projectile in the y direction that causes an object to travel in a parabolic arc?

• Friction
• Gravity
• Tension
• No force acting.

Tags

NGSS.HS-PS2-4

A projectile is launched from a height with an initial velocity v_0,x. The v_f,x represents the final horizontal velocity before impact.

• vix = vfx

• vix < vfx

• vix > vfx

• unable to determine