Forces Test Flashcards
(24 cards)
Which law states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an unbalanced force?
Newton’s 1st Law
A 4000 kg boat is speeding up at 4 m/s² down a 2000 m lake. What is the force exerted on the boat?
16,000 N
Which law states that how much an object accelerates depends on the mass of the object and the force applied.
Newton’s 2nd Law
Which law demonstrates the following: a bicycle tire pushes on the road and the road pushes back on the tire?
Newton’s 3rd Law
Which law demonstrates the following: a skateboarder hits a rock and is thrown over it onto the ground?
Newton’s 1st Law
Which law demonstrates the following: the magician quickly pulls the tablecloth from under a set of dishes and the dishes do not move?
Newton’s 1st Law
It takes 180,000 N to stop a 4000 kg truck. What is the acceleration of the truck?
45 m/s2
What is the vector sum of all forces acting on an object?
net force
A car parked at the top of a hill does not move down the hill due to what type of friction?
Static Friction
A 8100 kg truck is speeding up at 6 m/s². What is the force exerted on the truck?
48,600 N
Which laws states for every action, there is an equal and opposite reaction.
Newton’s 3rd Law
Which law explains why the planets resist a change of motion and continually orbit the sun?
Newton’s 1st Law
Which law explains why a cannon moves backward as the cannonball shoots out?
Newton’s 3rd Law
Choose which are non contact forces.
electrical force
magnetic force
gravitational force
A person throws a box with a force of 375 N. If the box accelerates at 50 m/s², what is the box’s mass?
7.5 kg
Which law demonstrates the following: the harder you hit a softball, the further the ball travels?
Newton’s 2nd Law
What term is used to describe objects at rest or objects moving at a constant velocity?
equilibrium
A skateboard coasts to a stop after landing at the bottom of a staircase on flat ground. What is the main type of friction slowed the skateboard down?
Rolling Friction
What is the tendency of an object to resist change?
inertia
A student pushes their backpack across a table. What is the main type of fiction is acting against the motion of the backpack?
Sliding Friction
A tow truck pulls with a force of 8700 N and is speeding up at 3 m/s². What is the mass of the truck?
2,900 kg
Which law explains why a soccer ball will stay where it landed until a person kicks it?
Newton’s 1st Law
Which law is demonstrated in the following: It is easier to push a shopping cart that is empty rather than one that is full of groceries?
Newton’s 2nd Law
Which law demonstrates the following: air is released from a balloon and the air pushes down and the balloon goes up?
Newton’s 3rd Law
