Question

A 6 N force pushing to the right on a box causes it to accelerate 3 m/s² to the right. What is the mass of the box?

A. 0.5 kg
B. 2 kg
C. 3 kg
D. 18 kg

A 4 kg object is being pulled to the east by a 6 N force. What is the object's acceleration?
A. 0.67 m/s², east
B. 0.67 m/s², west
C. 1.5 m/s², east
D. 1.5 m/s², west
Which of these quantities has a direction associated with it?
A. mass only
B. force only
C. acceleration only
D. force and acceleration
Acceleration is often measured in what unit?
A. newtons
B. kilograms
C. meters per second
D. meters per second squared
A 5 kg block is being pulled to the right by a rope tied to it. The block is accelerating at 2 m/s² to the right. How much force is being applied?
A. 3 N
B. 3.5 N
C. 7 N
D. 10 N
What type of forces accelerate masses?
A. balanced only
B. unbalanced only
C. balanced and unbalanced
If an object is acted on by a constant unbalanced force, the object will move with a constanWhich of these is a correct equation for force?
A. F = m × a
B. F = m ÷ a
C. F = a ÷ m
_____.
A. speed
B. velocity
C. acceleration
A 5 kg object is accelerating at 3 m/s² while being pulled. What is the magnitude of the force causing this acceleration?

A. 0.6 N
B. 1.7N
C. 2 N
D. 15 N
What is the mass of a rock if a 12 N unbalanced force acting on it causes the rock to accelerate at 4 m/s²?
A. 0.33 kg
B. 3 kg
C. 8 kg
D. 48 kg

Answer 1

So for the 1st one all you have to do is find the mass. F=ma So to find mass it's M=f/a 6/3=2

B.2kg is the correct answer.

Answer 2

A - 18 kg

B - 1.5 m/s2 east

C- force and acceleration

D- meters per second squared

E- 10 N

F- Unbalanced only

G - F = m × a

H- 15 N

I -3 kg

Step-by-step explanation:

• Force is defined as mass times force of gravity or F = ma
• For (A) F = 6N , a = 3 m/s2 hence mass = 6x3 = 18 kg
• For (B) mass = 4kg , Force = 6 N therefore acceleration = Force/mass = 1.5 m/s2 east
• Force and acceleration are vector quantities which means they have direction and value where as mass is a scalar quantity.
• Acceleration is measure in meter per second squared.
• Mass = 5 kg

acceleration = 2 m/s2

Force = 5 * 2 = 10 N

• unbalanced forces produces net force which in turn changes velocity and hence acceleration
• F = m x a = 5 x 3 = 15 N
• m = F/a = 12/4 = 3kg