Worksheets › Class 11 › Laws of Motion
Class 11 Laws of Motion worksheet
CBSE Physics. F = ma, momentum and impulse, friction, connected bodies, lifts, circular turns. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
A force of 48 N acts on a 8 kg body. Its acceleration is:
- 0.17 m/s²
- 384 m/s²
- 7 m/s²
- 6 m/s²
Answer
(d) 6 m/s²
a = F/m
- 2.
A ball of mass 1.9 kg hits a wall at 22 m/s and rebounds at 28 m/s. The magnitude of the change in its momentum is:
- 95 kg m/s
- 11.4 kg m/s
- 41.8 kg m/s
- 190 kg m/s
Answer
(a) 95 kg m/s
the velocity reverses: m(u₁ + u₂)
- 3.
A gun of mass 5 kg fires a bullet of mass 5 g at 728 m/s. The recoil speed of the gun is:
- 0.0728 m/s
- 7.28 m/s
- 728 m/s
- 0.728 m/s
Answer
(d) 0.728 m/s
M V = m v: 5V = 0.005 × 728
Section B · short answer
- 4.
A car of mass 550 kg moving at 20 m/s is stopped in 8 s. Find the average braking force.
Answer
1,375 N
F = m(v − u)/t
- 5.
A force of 16 N acts on a ball of mass 1 kg for 0.13 s. Find the impulse and the change in the ball's velocity.
Answer
2.08 N s; 2.08 m/s
impulse = Ft = mΔv
Section C · long answer
- 6.
Three blocks of 10 kg, 4 kg and 3 kg are joined by light strings on a frictionless table. A force of 16 N pulls the 3 kg block (the last one). Find the acceleration and the tension in each string.
Answer
a = 0.94 m/s²; tension between the first two blocks = 9.41 N; between the second and third = 13.18 N
each string pulls everything behind it
Fresh sheets for your child
In the app, every Laws of Motion sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.