Net force

Q. An elevator starts from rest with a constant upward acceleration. It moves 2 m in the first 0.6 s. A passenger in the elevator is holding a 3 kg package by a vertical string. The tension in the string during acceleration is (Take $g=9.8m/s^2$)

Q. When a constant force is applied on a body, it moves with constant:

1. Velocity
2. Momentum
3. Speed
4. Acceleration

Q. Choose the correct statement(s):
Statement 1: Unbalanced forces can change the direction of motion of a body.
Statement 2: A balanced force is required to accelerate the body.
Statement 3: An object moves with a uniform velocity when balanced forces are acting on it or if there is no net force acting on it.
Statement 4: Balanced force cannot bring an object at rest to motion.

1. Only statement 1

2. Statements 1, 3 and 4

3. Statements 1, 2 and 3

4. Only statement 2

Q.

If a body has to be pushed along positive X-axis, then in which direction the force should be applied?

1. Along +Y axis
2. Along +X axis
3. Along +Z axis
4. Force does not have any direction

Q.

If a body is at rest, it means no force is acting on it

1. False

2. True