Show:
Vocabulary
Net Forces
Mixed Practice
Weight
Elevator Problems
100
A push or a pull
What is a foce?
100
You push a block horizontally along a frictionless surface with a force of 100N. What is the net force on the block?
What is 100N?
100
A 45 kg child sits on a 3.2 kg tire swing. What is the tension on the ropes that hangs from the tree branch?
What is 470 N?
100
How much would a 75kg person weigh on Earth?
What is 735N?
100
What force would a scale in an elevator exert on a 55 kg person if the elevator was moving up at a constant speed?
What is 540 N?
200
The vector sum of all of the forces on an object
What is net force?
200
You and a friend each push a block along a frictionless surface with a force of 100N. What is the net force acting on the block?
What is 200N?
200
If a motorcycle starts from rest and maintains a constant acceleration of 3 m/s^2, what will its velocity be after 10 seconds?
What is 30 m/s?
200
The gravitational pull of Venus is 0.9 times the gravitational pull on Earth. How much would a 50 kg person weigh on Venus?
What is 45N?
200
What force would a scale exert on a 60.0 kg person as it slowed at 3.0 m/s^2 while moving upward?
What is 410 N?
300
The tendency of an object to resist changes in velocity
What is inertia?
300
You and your friend are arguing over a bag of potato chips. You pull with a force of 150N and your friend pulls in the opposite direction with a force of 75N. What is the net force acting on the bag (magnitude and direction)?
What is 75 N towards you.
300
How does an object's acceleration change if the net force exerted on the object is doubled?
What is the acceleration is doubled?
300
The gravitational pull on Nepture is 1.12 times the gravitational pull on Earth. How much would a 55 kg person weigh to Neptune?
What is 600 N?
300
A student stands on a bathroom scale in an elevator at rest on the 70th floor of a building. The scale reads 945 N. What is their mass in kg?
What is 96.4 kg?
400
The gravitational force experienced by an object.
What is weight?
400
A 5.0 kg flower pot falls from a railing. Calculate the net force on the flower pot. Neglect air resistance.
What is 49 N?
400
A 4.0 x 10^3 kg helicopter accelerates upward at 3.5 m/s^2. What lift force must be exerted by the air on the propellers?
What is 53,000 N?
400
The gravitational pull on Pluto is 0.06 times the gravitational pull on Earth. How much would a 70 kg person weigh on Pluto?
What is 40 N?
400
As the elevator moves up, the scale reading increases from 945 N to 1,045 N. Find the acceleration of the elevator.
What is 1.04 m/s^2?
500
When the net force of an object is zero.
What is equilibrium?
500
A 1.0 mg snow flake falls to the ground. What magnitude of force does it exert on the Earth?
What is 9.8 x 10^-6 N.
500
A 45 kg child sits on a 3.2 kg tire swing attached to a sagging tree branch with their feet on the ground. If the tension in the rope is 220N, what is the value of the force exerted by the ground on the child's feet?
What is 2.5 x 10^2 N?
500
The gravitational pull on Jupiter is 2.36 times the gravitational pull on Earth. If a person weighs 588N on Earth, how much would they weigh on Jupiter?
What is 1390 N?
500
As the elevator slows down, the scale reading drops to 872 N from 945 N. What is the acceleration of the elevator?
What is -0.757 m/s^2?