33. Which of the following would be a situation with unbalanced forces?

Question

a
Two people pulling on the same side of a wheelbarrow
b
A team of players in tug of war pulling on the rope, each team with equal numbers of people pulling with equal strength
c
Two people of opposite sides of a big tire. One pushes the tire and one pulls it with equal force
d
Two people not touching a crate that is sitting stationary

34. Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary

a
The force of gravity on the object is different if it is stationary or not.
b
The force of friction on the object is different if it is stationary or not
c
The force of the push on the object is different if it is stationary or not
d
The normal force on the object is different if it is stationary or not

35. The table below shows the mass and velocity of four objects. Which object has the least inertia?
Object: W, X, Y, Z
Mass (kg): 16, 15, 13, 2
Velocity (m/s): 2, 3, 20, 30

A) X
B) W
C) Y
D) Z

Answer 1

Here are the answers to your questions:

33. Which of the following would be a situation with unbalanced forces?

• Answer: a - Two people pulling on the same side of a wheelbarrow. This situation creates unbalanced forces because both individuals are exerting a force in the same direction, causing the wheelbarrow to accelerate in that direction.

34. Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary?

• Answer: b - The force of friction on the object is different if it is stationary or not. This is explained by the fact that static friction (when the object is stationary) is usually greater than kinetic friction (when the object is moving), making it harder to start an object in motion compared to keeping it moving.

35. The table below shows the mass and velocity of four objects. Which object has the least inertia?

• Objects and their masses:
  • W: 16 kg
  • X: 15 kg
  • Y: 13 kg
  • Z: 2 kg
• Inertia is directly related to mass; the lower the mass, the lower the inertia.
• Answer: D) Z - Object Z has the least mass (2 kg) and therefore the least inertia.

If you have any more questions, feel free to ask!