Answer and check all the questions in the picture.
A bus traveled 280 kilometers between two cities. It left the first city at 3:00 p.m. and arrived at the second city at 7:00 p.m. What was the average speed of the bus during the trip? O 4 km/h O 40 km/h O 70 km/h O 280 km/hThe graph below shows a runner's distance from the starting line during a 30 minute race. Distance was measured in meters (m). Time was measured in minutes (min). Distance vs. Time 5000 4000 3000- Distance (m) 2000 1000 10 20 30 Time (min) During which time interval was the object moving with the greatest average speed? O 0 to 5 minutes O 10 to 15 minutes O 15 to 20 minutes O 25 to 30 minutesA 20 N object is placed on a surface and starts to slide. What is the most likely reason the object begins to move? 0 Gravity exerts a balanced force on the object. An unbalanced force causes acceleration. 0 Friction is applied to the object. O The forces acting on the object are in equilibrium. The difference between mass and weight is that- Q weight is a measure of gravity's effect on an object; mass is a measure of the amount of matter in an object 0 weight is a measure of the amount of matter in an object; mass is a measure of gravity's effect on an object 0 weight is a measure of force; mass is a measure of velocity. 0 there is no difference. Identify the description with the correct Law of Motion. A swimmer turns and kicks off from the end of the pool Newton's Third Law of Motion A book will slide across the desk if you exert a force on it. Newton's First Law of Motion An object in motion will remain in motion in the same direction and at a constant speed unless another force acts Newton's First Law of Motion on it. F = mxa Newton's Second Law of Motion Law of inertia Newton's First Law of Motion Shows the relationship between mass, force, and Newton's Second Law of Motion acceleration For every action there is an equal and opposite reaction Newton's Third Law of Motion When a hammer strikes a nail, the nail exerts a force back Newton's Third Law of Motion on the hammer. :: Newton's First Law of Motion :: Newton's Second Law of Motion :: Newton's Third Law of MotionA student made a rocket balloon using an inflated balloon, a straw, a long piece of string, two poles, and some tape. It looked similar to the diagram below. String threaded Start position through straw Straw Tape marked on string String String attached attached to pole to pole Inflated balloon If the string were extremely long, what would eventually happen to the motion of the balloon? Explain your thinking.Base your answers to the question on the diagram below and on your Knowledge of science. The diagram represents a person pulling a cart with a box on it. The arrow represents the direction in which the person is moving. Explain why the box may continue to move fonNard if the cart suddenly stops moving. Clarence told his friends that he kept his car at a constant velocity while racing it along the track. Which best explains Why Clarenoe's statement about keeping his car at a constant velocity is wrong? 0 The speed of the car stayed the same. 0 The car encountered air resistance. The direction of the car changed. 0 The car track gave off heat. Zookeepers carry a stretcher that holds a sleeping lion. The total mass of the stretcher and lion is 175 kg. The lion's forward acceleration is 2 m/s2. What is the force necessary to produce this acceleration? O 350 N O 87.5 N O 0.011 N O 177 NTwo forces act on a block as shown in the picture. Left Right 20 N 10 N What is the net force on the block? O 10 N to the left O 10 N to the right O 30 N to the right O 30 N to the leftA student applied a force of 200 N to push a box 15 m down the sidewalk. Given the formula, W = F x d, how much work has been done? O 30 J O 300 J O 3,000 J O 30,000 JI UUUILHL I uni I u. 0 To move a refrigerator, forces are applied as shown. 135M 175:4 40h! Left Right Which of these statements best describes what will happen if the forces are applied at exactly the same time? 0 The refrigeiator will move left because of the greatest force on the right. 0 The refrigerator will move right because the force is over a greater surface area. O The refrigerator will remain in place because the forces are not enough to move a refrigerator. The refrigerator will remain in the same place because the net force is zero. To complete a project, 200,000 Joules of work are needed. The time taken to complete the project is 20 seconds. How much power is needed? P = Wit O 0.0001 J/s O 10,000 J/s O 200,020 J/s O 1,000,000 J/sTo complete a project, 200,000 Joules of work are needed. The time taken to complete the project is 20 seconds. How much power is needed? P = Wit O 0.0001 J/s O 10,000 J/s O 200,020 J/s O 1,000,000 J/sAn investigation is pedormed to determine how the angle of a ramp affects the speed of a ball as it rolls down the ramp. In addition to using the same ball and the same ramp, which of these should also remain constant? releasing the ball from the same position in each trial 0 keeping the ramp at the same height for all trials 0 keeping the ramp facing the same direction for all trials 0 measuring the length of the ramp before each trial A group of students built a catapult that releases marbles. The students performed several trials with marbles of different masses. Catapult Information Mass of Marbles Distancemveled (at (mt \" Based on the information, which is the independent variable in the experiment? 0 the type of marbles O the size of the marbles Q the mass of the marbles O the distance the marbles traveled
