Physics - Newton’s laws and projectile motion

• What is Newton‘s first law of motion?

  An object will remain at rest or motion unless acted upon my another external resultant force
• What is newton‘s second law of motion?

  The rate of change of an objects linear momentum is directly proportional to the resultant external force. The change in momentum takes place in the direction of the force. Basically F=ma ; the larger the resultant force the larger the acceleration.
• What is newtons 3rd law?

  When body A exerts a force on body B, body B exerts an equal and opposite force on body A.
• Terminal velocity - If an object is pushed out of a plane it will accelerate towards the ground beca of its weight. Its velocity will increase as it falls but so will the drag forces acting on the object. Eventually the air resistance will balance the weight of the object so there will be no more acceleration and will reach its terminal velocity.
• What happens to the two balls released at the same time?

  They fall at the same rate
• Why do the two balls fall at the same rate?

  Because horizontal and vertical motions are independent
• How does the fired ball's horizontal distance change over time?

  It covers the same distance each second
• How does vertical velocity change as the ball falls?

  It accelerates at a rate of $g =$$9.81 \text{ m/s}^2$
• How does horizontal velocity affect vertical velocity?

  It has no effect on vertical velocity
• If a ball is fired from a cannon at high horizontal velocity, what happens to its time to reach the ground?

  It takes the same time to reach the ground
• What is the effect of a higher horizontal velocity on the distance traveled?

  It would travel further