MEDIUM
9th CBSE
IMPORTANT
Earn 100

An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.

Important Questions on Force and Laws of Motion

EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 2
When a carpet is beaten with a stick, dust comes out of it. Explain.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 3
Why is it advised to tie any luggage kept on the roof of a bus with a rope? 
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 4
A batsman hits a cricket ball which then rolls on level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 5
A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400 m in 20 s. Find its acceleration. Find the force acting on it if its mass is 7 tonnes. 
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 6
A stone of 1 kg is thrown with a velocity of 20 m s–1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 7
 A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate the net accelerating force. 
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 7
 A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate the acceleration of the train.  
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 9 - Force and Laws of Motion>Exercises>Q 8
An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 m s–2?