Core Practical 9: Impulse

Question 1

CP9 Apparatus

Answer 1

• Light gates
• Card
• Trolley
• Slightly tilted ramp
• String
• Pulley
• Hanging massC

Question 2

CP9 Method

Answer 2

1. Set apparatus pulley fixed to edge of desk, string passing over; one end attached to trolley and other to hanging mass, light gates at either end of ramp
2. Masses and card placed in trolley
3. Release trolley and record velocity through each gate and time taken to travel between gate
4. Repeat readings for different values of m
5. Calculate mean time/velocity for each value of m

Question 3

Why is the ramp slightly tilted in CP9?

Answer 3

To overcome effect of friction

Question 4

Eval CP9

Answer 4

Height of card
- Should be tall enough to trigger light gate
Straight line path
- Ensure trolley travels in straight line for accurate velocity and time
Air resistance
- increases resultant force, decreases velocity

Question 5

CP9 Safety

Answer 5

Safety from mass
- stand away from masses in case they drop
Keep liquid away from electric equipment