4.6. A block of mass 20kg is at rest on a rough horizontal ground.
The coefficient of friction between the block and the ground is 0.3. A
horizontal force F is applied steadily to the block according to the
law: F=ť - t + 4, F is in newtons and t is the time in seconds
Calculate the time it takes the block to start moving. What is the
speed of the block when t = 4.Os.

How are momentum and impulse related? impulse is a whim to do something, while momentum keeps it going impulse is another name fore instantaneous momentum the impulse acting on and object is equal to the change of momentum it causes. the impulse that acts on and object is the momentum that results.

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.