Kinematics

A horizontal line in a velocity-time graph represents______.

• no motion at all

• uniform motion

• uniformly accelerated motion

• uniformly decelerated motion

The scope of a line tangent to a point on a displacement-time graph for a uniformly accelerated motion gives______.

• acceleration

• average velocity

• initial velocity

• instantaneous velocity

A horizontal line in a displacement-time graph represents______.

• no motion at all

• uniform motion

• uniformly accelerated motion

• uniformly decelerated

At the maximum height of an object thrown vertically upward,______.

• velocity=0,acceleration= -g

• velocity=0,acceleration=g

• both velocity and acceleration=0

The greater the mass of an object,______

• the more balanced it is

• The greater is its inertia

• the more space it takes up.

• the easier it is to be moved.

If the net force acting on a stationary object is zero, then the object will _____.

• remain at rest

• begin moving backward

• decelerate at a steady rate of speed

• accelerate in the direction of the strongest force.

Which of Newton's Law best explains why motorists should buckle up?

• Law of Inertia

• Law of Interaction

• Law of Acceleration

• Law of Universal Gravitation

The product of mass and velocity is called______.

• acceleration

• force

• impulse

• momentum

When two cars collide, the forces they experience are equal but opposite. What else is true?

• The cars will not move at all

• Their accelerations are equal

• The heavier car will have less acceleration than the lighter car.

• The heavier car will have greater acceleration than the lighter car.

For a system consisting of two particles that undergo an elastic collision,______

• Kinetic energy is conserved but momentum is not

• Momentum is conserved but kinetic energy is not.

• both kinetic energy and momentum are conserved

• neither kinetic energy nor momentum is conserved.