Ch 4 Motion Ch 5 Forces Ch 6 Newtons laws Ch 7 Energy Ch 8 Phase changes

Question T he speed you read on a speedometer

Answer 1 – 10 Instantaneous speed

Question A cart is rolling down a ramp, when the ramp angle is increased to make the ramp steeper, the cart will…

Answer 1 – 20 Have greater acceleration

Question A snowboarder begins his run from rest (point 1) on top of a hill. He moves straight down the slope until he reaches the bottom of the hill (point 4) and the ground levels off. The snowboarder continues to move horizontally across the level ground and eventually comes to a stop (point 5). Which graph best represents the speed of the snowboarder as he moves from point 2 to point 3?

Answer 1 – 30

Question The speed of the bus from point B to C is

Answer 1 – 40 Negative acceleration Decelerating

Question Bob runs the 100 m dash during a track meets and wins. He completed the m sprint in 11.2 seconds. Bob’s velocity during the race

Answer 1 – m/s towards the finish line

Question If an elephant has a mass of 2,000 kg, her weight on Earth is

Answer 2 – 10 19,600 N

Question The length of the arrow indicates the strength of the force.

Answer 2 – 20 vector

Question A force that resists the motion of an object moving across a surface

Answer 2 – 30 Sliding friction

Question A box resting on a table without moving

Answer 2 – 40 Is in equilibrium

Question Shows the normal force acting on the box

Answer 2 – 50 D

Question Changes in motion come from:

Answer 3 – 10 Unbalanced forces

Question The SI Unit for force

Answer 3 – 20 Newton

Question You stand on a skateboard and push off the ground with one of your feet. The force applied by your foot to the ground compare to the force applied by the ground to your foot

Answer 3 – 30 Are equal

Question Spin a raw egg on the table, stop it with your hand, and remove your hand quickly. The egg will begin to spin again with no help at all!

Answer 3 – 40 Newton’s first law

Question When comparing the inertia of two objects consider this only.

Answer 3 – 50 Mass

Question Natalie lifts a 15-kg rock from the ground onto a 1.5 meter high wall. The amount of potential energy she has given the rock

Answer 4 – Joules

Question If you do 500 joules of work using a force of 50 newtons, over what distance was the work accomplished?

Answer 4 – m

Question A marble rolls along the track below with no friction. The sequence of positions on the track listed in order from the lowest kinetic energy to the highest kinetic energy is:

Answer 4 –

Question At what location does the ball have the least gravitational potential energy?

Answer 4 – 40 C

Question The rollercoaster on a track transfers a lot of energy to heat and sound energy but the amount never changes.

Answer 4 – 50 The law of conservation of energy

Question The graph below was drawn using data recorded as water at - 20°C was heated to 100°C. On the graph, letters A, B, C, and D label arrows pointing to various sections of the graph. the section of the graph representing the time during which only ice is present is:

Answer 5 – 10 A

Question phase of matter are atoms free to move but don’t have enough energy to completely break bonds?

Answer 5 – 20 liquid

Question A gas at a temperature of 160°C cools until it becomes a solid at a temperature of 20°C. The diagram below represents a graph of the temperature vs. time data for these changes. the interval from time 2 minutes to 10 minutes, the substance is

Answer 5 – 30 Changing from a gas to a liquid

Question At 120 °C and 80 °C is a phase change and this is known because

Answer 5 – 40 There is no temperature change Graph line is horizontal

Question The solid phase of matter are molecules or atoms most restricted in their ability to move making them more __________ than liquids and gases.

Answer 5 – 50 dense