Welcome to your Grade 11 Physics chapter 4
After carefully reading the following 30 questions, choose the correct answer.
1.
Which law states that an object at rest will remain at rest unless acted upon by an external force?
2.
What is the SI unit for the coefficient of friction?
3.
Which type of friction acts on an object that is already in motion?
4.
Work is defined as the product of displacement and:
5.
What is the equivalent of 1 Joule in the cgs unit system?
6.
Linear momentum is defined as the product of a system’s velocity and its:
7.
What is the first condition of equilibrium for a system of forces?
8.
If the speed of a particle is doubled, by what factor does its kinetic energy change?
9.
Which point in a body is where the total mass is assumed to be concentrated?
10.
Power is defined as the rate of:
11.
What is the work done on a 10kg block by a 20N force at 30° above horizontal over 5m?
12.
In the formula for elastic potential energy (1/2 kx²), what does 'k' represent?
13.
What is the linear momentum of a 0.5 kg box moving at 6 m/s?
14.
According to the text, the momentum takes the same direction as:
15.
Which of these units is used for momentum?
16.
When Newton’s second law is expressed in terms of momentum, it relates force to the change in:
17.
What happens to the kinetic energy if a particle's net work done on it is zero?
18.
A 200 kg mass with 1600 J of kinetic energy has a momentum of:
19.
Why is it easier to climb a mountain on a zigzag path rather than straight up?
20.
What force is calculated as the product of the coefficient of friction and the normal force?
21.
Static friction is generally ______ than kinetic friction.
22.
In the expression W = (F cos θ) S, what does θ represent?
23.
A box is pushed with 120 N over 0.80 m with 5 N friction. The net work is:
24.
Can kinetic energy be negative?
25.
Elastic potential energy depends on the distance the spring is stretched and the:
26.
Which law is often called the law of inertia?
27.
If a bullet has twice the mass of another but same speed, its kinetic energy is:
28.
Force F1 transfers energy to a box at 10 J/s. This 10 J/s is the:
29.
If net work is negative, the kinetic energy of the object:
30.
Newton's second law states that acceleration is proportional to net force and inversely to:
