Modelación del movimiento

• -23i+7j-k

• 23i+7j-k

• -2i+j-7k

• -3i+7j-k

• 11𝑖-13𝑗+3𝑘

• -11𝑖+13𝑗−3𝑘

• 1𝑖+13𝑗−3𝑘

• 11𝑖+13𝑗−3𝑘

Find the angle between v and w

• 21.8 degrees

• 111.8 degrees

• 68.2 degrees

If the dot product of two vectors are equal to zero, then what do we know about the two vectors?

• They are parallel.

• They are perpendicular.

• They are neither.

What is the horizontal acceleration of a projectile?

• 0 m/s²
• 9.8 m/s²

Tags

NGSS.HS-PS2-1

Two objects of the same mass are launched from the ground. Object A has a launch angle of 45, while Object B has a launch angle of 65. Which object will hit the ground first?

• A
• B
• Both objects hit the ground at the same time
• unable to determine with the given information

A projectile is fired with initial velocity v_o at an angle θ₀ with the horizontal and follows the trajectory shown above. Which of the following pairs of graphs best represents the vertical components of the velocity and acceleration, v and a, respectively, of the projectile as functions of time t?

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

If you throw a baseball straight up, what is its 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 velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle