CRCT Prep A force F 1 is required

CRCT Prep

A force (F 1) is required to pull a 20 -kg box across a carpeted floor. What is typically true about the force (F 2) required to pull the boxes across the ice at a rink? A. B. C. D. F 1 is greater than F 2. F 1 is less than F 2. F 1 equals F 2 but both are less than 20 kg. F 1 equals F 2 and both are equal to 20 kg.

Pauline needs to measure the sliding friction of a brick. How should she go about doing this? A. attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground B. drag the brick by a string attached to a spring scale so that it gradually speeds up C. drag the brick by a string attached to a spring scale along the surface of a table at a constant speed and read the force D. hang the brick from a string attached to a spring scale and read the force

Which of the following arrangements will remain stationary unless an external force acts on it? Assume there is no friction. A. C. B. D.

Two children are playing on a seesaw in the park. Child A, who weighs less than child B, is suspended in the air. In order to raise Child B into the air, Child A must A. move farther away from the fulcrum of the seesaw. B. jump up and down in place. C. move closer to the fulcrum of the seesaw. D. do nothing.

Sam was learning how to rollerskate. He did not want to go fast. On which kind of floor surface would Sam travel the slowest? A. B. C. D. carpet concrete tile wood

A car is traveling down a hill. Which of the following will affect the amount of energy the car has? A. B. C. D. how long the car is the time of day how much the car weighs the color of the car

All objects in the universe are attracted to each other by the force of A. B. C. D. effort. friction. gravity. inertia.

Suzan places a marble and a ball of modeling clay on the surface of water in a jar. Both objects sink. Suzan removes them from the water. Then she molds the clay ball into a bowl shape and again places the two objects on the surface of the water. What happens next? A. The marble and the clay bowl both sink. B. The marble and the clay bowl both float. C. The marble floats and the clay bowl sinks. D. The marble sinks and the clay bowl floats.

Why do some competitive swimmers shave their heads and bodies? A. B. C. D. to decrease weight to decrease friction to increase buoyancy to increase blood flow

Oliver the dog doesn’t want to walk in the rain. He can make his owner pull harder on the leash to get him out the door by A. B. C. D. sitting on the vinyl floor sitting on the tile floor. sitting on the carpeted floor. sitting on the wood floor.

Katie sent a soccer ball toward Andy on a flat field. The ball started moving because of which force? A. her kick B. gravity C. friction D. air inside the ball

Which of the following is true about the relationship between an object’s mass and its weight? A. The object’s mass is caused by the weight of the object pushing downward. B. Weight is gravity’s force on the object, which is determined by it’s mass. C. An object’s weight and its mass are the same, but they are measured differently. D. An object’s weight and its mass are independent of each other.

Jeff was riding in a car. Which change demonstrates the greatest effect of inertia? A. B. C. lane. D. to The car makes a sudden stop. The car slows down gradually. The care changes into another The care runs out of gas and rolls a stop.

Simon rolled his ball down a hill. The ball stopped before it reached the bottom of the hill. Which of these most likely stopped the ball from rolling? A. B. C. D. mass gravity friction inertia

Susan plays a game of marbles with John. She tries to knock John's marble out of the circle. She rolls her marble and it hits John's marble. How would John's marble move after being hit? A. B. C. D.