A heavy person and a light person parachute together and wear the same size parachutes. Assuming they open their parachutes at the same time, which person reaches the ground first?
What is the heavy person.
100
When a woman stands with two feet on a scale, the scale reads 280 N. When she lifts one foot, the scale reads _______.
What is 280 N.
100
What is pressure?
What is force per area.
100
Would a person standing on skis or in high-heel shoes exert more pressure on the ground?
What is high heel shoes.
200
A tennis ball and a solid steel ball with the same diameter are dropped at the same time. Which ball has the greater force acting on it?
What is the steel ball.
200
If the force on an object triples, what happens to the object's acceleration?
What is it triples?
200
A push on a 1-kilogram brick accelerates the brick. Neglecting friction, to equally accelerate a 4-kg brick, on would have to push how much?
What is 4 times as much.
200
A book weighs 5 N. When held at rest in your hands, what is the net force on the book?
What is 0 N.
200
When an object reaches terminal velocity, what is its acceleration?
What is 0 m/s2
300
The acceleration of an object is ____________ proportional to the net force acting on it.
What is directly.
300
What is the unit of pressure?
What is the pascal.
300
The acceleration of an object is ____________ proportional to its mass.
What is inversely (indirectly).
300
The acceleration produced by a net force on an object is in the ___________ direction as the net force.
What is same.
300
What is the unit of force?
What is the Newton.
400
A 20 N falling object encounters 4 N of air resistance. The magnitude of net force on the object is _________.
What is 16 N.
400
Suppose a cart is being moved by a force. If suddenly a load is dumped into the cart so that the cart's mass doubles, what happens to the cart's acceleration?
What is it halves.
400
A girl pulls on a 10 kg wagon with a constant force of 20 N. What is the wagon's acceleration?
What is 2 m/s2
400
Suppose the force of friction on a sliding object is 25 N. The force needed to maintain a constant velocity is how much?
What is 25 N.
400
A karate chop delivers a blow of 1500 N to a board that breaks. the force that acts on the hand during this feat is how much?
What is 1500 N.
500
How much force is needed to accelerate a 4 kg physics book to an acceleration of 2 m/s2?
What is 8 N.
500
A sports car has a mass of 1500 kg and accelerates at 5 m/s2. What is the magnitude of the force acting on the sports car?
What is 7500 N.
500
A two truck exerts a force of 2000 N on a car, acceleration it as 1 m/s2. What is the mass of the car?
What is 2000 kg.
500
You push with 27 N on a 10 kg chest, and there is 7 N force of friction. How fast will the chest accelerate?