WorksheetsCollision, Friction, Work and Power Formative
Total questions: 17
Worksheet time: 16mins
In the sport of curling, the stone has a smooth outer ring that is in contact with the ice. Which applies as the stone moves across the ice?
The coefficient of dynamic friction
The coefficient of static friction
The coefficient of dynamic drag
The coefficient of static drag
Which has the lowest coefficient of friction?
Steel skates on ice
Athletic shoes with spikes on a running track
Rock climbing shoes on an artificial climbing wall
Football (soccer) boots on a turf field
Which of the following images demonstrates static friction? The figures show: A. a cyclist in aerodynamic position riding a bicycle; B. a sprinter running; C. a two-person bobsleigh on ice; D. a person seated and pushing with the feet against a vertical wall to hold position.
Cyclist riding a bicycle
Sprinter running
Two-person bobsleigh on ice
Person seated pushing feet against a wall
Which correctly describes the static and dynamic friction experienced by a speed skater as they push off at the start of a race?
Static friction equals dynamic friction
Static friction is larger than dynamic friction
Static friction is smaller than dynamic friction
Static friction stays the same and dynamic friction increases
[Maximum mark: 1] Which statement is correct about friction?
Acts parallel to the interface of two surfaces that are in contact, and opposes their relative motion.
Acts perpendicular to the interface of two surfaces that are in contact, and opposes their relative motion.
Acts perpendicular to the interface of two surfaces that are in contact, and promotes their relative motion.
Acts parallel to the interface of two surfaces that are in contact, and promotes their relative motion.
[Maximum mark: 1] What is friction?
The force acting parallel to the interface of two surfaces that are in contact
The force or forces acting to oppose the motion of a tennis ball through the air
The force or forces acting to oppose the motion of an object through a fluid
The force that acts to increase the acceleration of objects
What does μ stand for in the equation F=μR ?
Friction
Drag force
Normal reaction force
The coefficient of friction
Climbers put chalk on their hands to increase the grip between their fingers and the climbing surface. The chalk absorbs body oils and sweat. Which describes the changes in friction caused by the chalk?
The chalk increases the coefficient of static friction.
The chalk increases the normal force of the climber.
The chalk decreases the coefficient of static friction.
The chalk decreases the coefficient of dynamic friction.
[Maximum mark: 1] Four climbers compare the grip quality of their boots. Using the data provided, which climber’s boots have the greatest friction force? Data table: coefficient of friction and normal reaction force for each climber’s boots are as follows.
Coefficient of friction 1.0 with normal reaction force 650 N
Coefficient of friction 0.8 with normal reaction force 1000 N
Coefficient of friction 1.5 with normal reaction force 600 N
Coefficient of friction 1.1 with normal reaction force 500 N
[Maximum mark: 1] In the sport of curling, team members slide a large stone across ice towards a target. Which coefficient is relevant to the stone as it moves across the ice?
The coefficient of static friction
The coefficient of dynamic friction
The coefficient of static drag
The coefficient of dynamic drag
You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?
Yes, work was done
No, work wasn't done
The momentum of an object depends upon the object's ___________&_____________.
size and shape
mass and speed
mass and veloctiy
mass and energy
Perfectly inelastic
