8. In the figure below, the arrow represents the direction of motion of the car initially at rest. What will happen to the ball hanging from the roof of the car if the moving car suddenly stops? (2 marks) Because it is in motion

Two untethered astronauts on aspace walk decide to take a breakand play catch with a baseball.Describe what happens as thegame of catch progresses

We can use unbalances forces to affect speed. A rocket engine will propel the object forward very quickly, while a parachute , will slow the car down. Castro When on a motor bike, you lean to one side to turn corners. Turning the bike creates friction between the tires and the road, changing the direction of a bike. Short Answer Questions 1. A driver and his passenger get out of their car, that has run out of gas on the street. They cannot agree on which gas station is closer, so they begin pushing with equal force on opposite ends of the car. a. Make a sketch of this car-pushing situation using arrows to represent the forces on the car. b. Use your sketch to explain whether the forces on the car are balanced or unbalanced. 2. A floatplane lands on the harbor. When the float touches the water, the plane sows down. a. Are the forces on the plane balances or unbalanced? Explain. b. What type of force does the water exert on the plane's floats, which causes the motion of the plane to slow…

A father and his young daughter are ice skating. They faceeach other at rest and push each other, moving in oppositedirections. Which one has the greater final speed? Explain.

16. During a lecture demonstration, a professor places two coins on the edge of a table. She then flicks one of the coins horizontally off the table, simultaneously nudging the other over the edge. Describe the subsequent motion of the two coins, in particular discussing whether they hit the floor at the same time.

18. An object that is moving freely in one dimension under the influence of gravity alone. * O Free falling object O Projectile O Newtonian body Inertial object

8. A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 70 kg. (2.7 kN)

2. Aman pushes two boxes with the same amount offorce (because they look identical and he can't see inside them). The boxes are made of the same material, but oneis full and the other is empty. Which box will speed up more? (Your explanation should obviously connect to the formula F = ma.)

Two blocks of mass ? and 2? rest on a rough incline plane with coefficient of kineticfriction ??. The two blocks are connected to a cable with tension ?1, and the block of mass ? isconnected to a ball of mass ? by a cord over a lightweight, frictionless pulley with tension ?2, asshown below. When the system is released from rest, the ball of mass ? accelerates downward,and the two blocks accelerate up the incline. You may ignore the mass of each cord.

A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25kg. What is the minimum acceleration with which the monkey can climb up along the rope? (g = 10m/s2) a) 5m/s2 b) 10m/s2 c) 25m/s2 d) 2.5m/s2