Grade-9 Physics-Force and Laws of Motion

Forces acting on the body A in equilibrium are:

• Unbalanced Forces

• Balanced Forces

• Any of A and B

• Can't say

Tags

NGSS.HS-PS2-1

No force is required for:

• changing the direction of a specific moving cart

• increasing the speed of the cart

• decreasing the speed of the cart

• moving the cart with same speed along the same direction

Tags

NGSS.HS-PS2-2

Newton's 1^st law of motion is also known as the

• Law of Planetary motion

• Law of inertia

• Law of action-reaction

• Law of gravitation

A force of 10N acts on a body of mass 20KG for 10 seconds. The change produced in momentum is given by:

• 5 KG m/s

• 100 KG m/s

• 200 KG m/s

• 2000 KG m/s

Tags

NGSS.HS-PS2-1

Different amount of forces are applied on four balls of different masses. The respective acceleration of each ball is given in the table. So, what is the maximum force applied on the ball?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS2-1

A train passes over a 400 m long bridge. If the speed of the train is 30 m/s and the train takes 20 s to cross the bridge, then tell me the length of the train (your gift for correctly answering this question is a chocolate).

• 400 m

• 200 m

• 600 m

• 800 m