IB Sports - Forces & motion 2

Newton's first law (inertia) states that...

[90 seconds]

• An object is still unless an unbalanced force is acting on it.

• The speed of an object will change when an unbalanced force is applied to it

• The velocity of an object will change when an unbalanced force is applied to it

• If a force is applied to an object, it will always be in motion

What is the net force shown in the diagram?

[45 seconds]

• 50 N, vertical

• 50 N, horizontal to the right

• 150 N, horizontal

• 50 N, horizontal to the left

If we wanted to make a space simulation (no gravity) using a plane...

[30 seconds]

• the plane needs to go no space

• It needs to be free falling

• It needs to be accelerating at 9,8 m/s^2 in any direction

• It needs to be accelerating at 9,8 m/s^2 upwards

For a car to stop moving it needs to...

[30 seconds]

• Reach the highest point of its trayectory

• Accelerate in the same direction as it's velocity

• Have an acceleration of 0 m/s^2

• Accelerate in the opposite direction of it's velocity

Choose the FALSE statement about the velocity vs tome graph. Times are APPROXIMATE.

[60 seconds]

• During the first 15 seconds, both the velocity and the acceleration have the same direction & are pointing the same way

• Between 15 & 45 seconds the object isn't moving

• If this was a car, the driver probably hit the breaks at approximately 45 seconds

• There is no acceleration between 20 & 30 seconds, not between 55 & 60 seconds