1. A hiker drops her backpack from the top of a 340 m hill. a) Find the velocity of the backpack when it reaches the bottom of the hill. [2 marks]

b) How many seconds does it take for the backpack to reach the bottom of the hill? [2 marks]

2. A person pushes a table of mass 15 kg, accelerating it from 3.2 m/s to 5.5 m/s in 3.0 s. What is the net force applied to the table? [3 marks]

3. A concrete block has mass 533kg. What horizontal force is needed to just start the block moving across the floor when coefficient of static friction is 0.450? Draw FBD. [3 marks]

4. A 38 kg crate is pulled along the horizontal surface by a force of 55 N as shown. The coefficient of friction between the two surfaces is 0.12. Draw FBD.

a) Find the horizontal and vertical components of force. [1 mark] b) Find the normal force [3 marks]

c) Find the friction [1 mark]

d) Find the horizontal acceleration of the crate [3 marks]

e) Find the distance the crate moves in 6.0 s, considering it starts from rest [2 marks] ? = 18 F = 55 N 5.

The system in the following diagram is used to suspend a 85 N object. Find the tensions in the cables. [5 marks]

Q '5. The system in the followln g diagram Is used to suspend e" 66 N m {ELI-- tensions in the cables. - .1. . [5 FORCE mom