Do you remember? - Introduction to Forces
Published:
Do you remember?
* What is the piece of equipment shown in Figure 15.1? What is the force pulling down on the apple and where is it pulling the apple to – the ground or the centre of the Earth?
* Look at Figure 15.2 and answer the following questions.
a What is the force pushing the kite in the air?
b What is the force pushing up on the boat?
c If one tug of war team drags the other across the ground, what force is acting between the feet of the losing team and the ground?
* An applied force is a force that is applied by something to something else. It can be a push or a pull. Use this information to describe the applied force when:
a you move this book across your desk
b a car tows a trailer.
This question includes visual content: The image contains several illustrations: 1) Figure 15.1 shows a hand holding a spring balance (Newton meter) with a green apple hanging from it, measuring 1 Newton. 2) Figure 15.2 depicts various children playing tug-of-war and other activities to show forces acting in different ways. 3) Figure 15.3 shows cricketers playing, demonstrating applied forces changing the motion of a ball. There is also an experimental section titled 'Can your power to estimate forces be improved?' featuring a Newton meter and a bag.
Animated Video Solution
The first half plays free, the full solution is in the app.
Step by Step Written Solution
Let's work through the 'Do you remember?' section from your textbook, focusing on the basics of forces and equipment.
Do you remember?
Question one asks about the equipment in Figure fifteen-point-one. What is its name, and what forces are acting on the apple?
1. Equipment & Forces
The equipment is a spring balance, or a force meter. The force pulling down on the apple is the force of gravity, also known as weight. It pulls the apple toward the center of the Earth.
Moving to Figure fifteen-point-two, we need to identify specific forces in different scenarios.
Forces in Action (Fig 15.2)
First, what force pushes a kite into the air? That would be air resistance, or more specifically, the aerodynamic lift caused by the wind.
a) Force pushing a kite: Air resistance / Wind force
Second, what force pushes up on a boat? This is the upward force exerted by a fluid, which we call upthrust or buoyancy.
b) Force pushing up on a boat: Upthrust / Buoyancy
The rest of this solution is on Solvi
5 more steps are locked. Watch the full animated, narrated solution for free.
Snap a photo, solve any question like this.
Watch the Rest for Free
Free to download · First solutions are on us
