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by BlastRoom
A mixed end-of-unit review of motion, net force, Newton's three laws, kinetic energy and collision design.
#us_grade_8_science
40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
Look at the distance-time graph for a delivery drone. The line is straight from the first point to the last. What was the drone's speed?
A commuter train travels 1,500 m along a straight track in 60 s without changing speed. What is its speed?
A runner jogs at a steady 4 m/s for 3 minutes along a straight path. How far does she travel?
A car on a straight road speeds up from 8 m/s to 26 m/s in 6 s. What is its acceleration?
Look at the speed-time graph recorded for a city bus over 40 s. What does the graph show about the bus's motion during that time?
Look at the distance-time graph for a hiker on a straight trail. What was the hiker doing between 20 minutes and 30 minutes?
A student walks 40 m east along a hallway, then turns and walks 15 m west along the same hallway. What is his displacement from where he started?
A delivery van covers 9 km on a straight highway in 15 minutes. What is its average speed in meters per second?
Two workers push a cart in the same direction, one with 30 N and one with 45 N, while friction pushes back on the cart with 15 N. What is the net force?
A crate is already sliding across a warehouse floor. A worker pushes it forward with 120 N while friction pushes back on it with 120 N. What happens to the crate?
A textbook rests on a table. Gravity pulls it down with 8 N and the table pushes up on it with 8 N. What happens to the book?
A tugboat pushes a barge east with 4,000 N while water drag pushes it west with 2,500 N. How does the barge's motion change?
Four forces act on a moving sled: 250 N forward, 100 N backward, 400 N upward from the snow and 400 N downward from gravity. What is the net force on the sled?
A city bus brakes hard and a standing passenger lurches forward toward the windshield. What best explains the lurch?
A hockey puck slides across frictionless ice with no net force acting on it, and it keeps moving at the same speed in the same direction.
A student claims the forces on a falling paper coffee filter are balanced. Which observation would support that claim?
A 3 kg cart on a smooth track feels a net force of 24 N. What is its acceleration?
A loaded 12 kg wagon accelerates at 2.5 m/s² along a level path. What net force acts on the wagon?
A net force of 45 N gives a rolling suitcase an acceleration of 9 m/s². What is the mass of the suitcase?
A robot pushes a bin with a fixed net force. The next bin has three times the mass and gets the same net force. How does its acceleration compare?
Two identical 2 kg carts sit on a track. Cart X gets a net force of 6 N and cart Y gets a net force of 12 N. How does cart Y's acceleration compare with cart X's?
Look at the table of results for three carts, each pushed with the same 10 N net force. What relationship do the data show?
A loaded shopping cart and an empty one are pushed with the same net force. Which one speeds up faster, and why?
A 1,200 kg car and a 2,400 kg van each accelerate at 2 m/s² leaving a stoplight. How does the net force on the van compare with the net force on the car?
A model rocket's engine pushes hot gas downward and out through its nozzle, and the rocket climbs. What pushes the rocket upward?
A 15,000 kg truck runs head-on into a 1,200 kg car. How do the forces the two vehicles exert on each other during the crash compare?
A bowling ball strikes a plastic pin. The pin flies away while the ball's motion barely changes. What best explains the difference?
A student walks forward across a gym floor. Which pair of forces is the action-reaction pair that moves her?
Two students stand facing each other on skateboards on level ground. One student pushes the other on the shoulders. What happens?
Two carts of different masses collide on a track, and each cart carries a force sensor. What will the sensors record at the moment of impact?
A rolling cart hits a stationary cart of equal mass, stops, and the second cart moves off. Why did the first cart stop?
In a collision between a moving object and a still object, only the moving object exerts a force.
A 1,000 kg car speeds up from 10 m/s to 20 m/s on a highway ramp. How does its kinetic energy change?
Two delivery trucks travel at the same 15 m/s. One has a mass of 2,000 kg and the other 4,000 kg. How does the heavier truck's kinetic energy compare?
A 4 kg bowling ball rolls down a lane at 3 m/s. What is its kinetic energy?
A 60 kg cyclist rides at 8 m/s while a 1,200 kg car creeps through a parking lot at 2 m/s. Which has more kinetic energy?
Crash tests show that damage rises far more sharply when test speed is increased than when the vehicle's mass is increased by the same factor. Which relationship explains that?
A team designing a bike helmet liner must keep head acceleration under a set limit in a 2 m drop test, and must cost no more than $12. Which is a constraint?
Look at the table of drop-test results for four egg packaging designs tested from the same height. Which design protects the egg best?
The front end of a car is built to crumple in a crash instead of staying rigid. How does crumpling protect the people inside?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Heredity and Genetics Review
40 questions
